EXHIBIT 10.27
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                              GENETIC VECTORS, INC.

                         EXECUTIVE EMPLOYMENT AGREEMENT
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        This  Executive  Employment  Agreement  ("Agreement")  is made in Miami,
Florida effective as of July 1, 1999, by and between GENECTIC  VECTORS,  INC., a
Florida  corporation  (the  "Company"),  and MEAD M. McCABE,  SR., an individual
residing in Miami,  Florida (the  "Executive"),  who hereby agree as hereinafter
provided.

        Section 1.    DEFINITIONS.  As used  herein,  the  following terms shall
have the  meanings  set forth below.

        "AGREEMENT"  shall  have  the  meaning  set  forth  in the  introductory
paragraph hereof.

        "BASE COMPENSATION" shall have the meaning set forth in Section 5(a).

        "BOARD OF DIRECTORS" means the incumbent  directors of the Company as of
the point in time reference thereto is made in this Agreement.

        "CAUSE" shall have the meaning set forth in Section 11(b).

        "COLA  ADJUSTMENT"  means the cost of  living  adjustment,  which  shall
correspond to the percent rise in prices for the  preceding  year as measured by
the Consumer Price Index for all Urban Consumers (CPI-UC). All City Average, all
Items (base year 1982-1984 = 100)  published by the United States  Department of
Labor,  Bureau of Labor  Statistics (the "INDEX").  The COLA Adjustment shall be
determined by multiplying the amount or figure to be adjusted by a fraction, the
numerator of which is the Index published for the month in which occurs the date
of adjustment and the  denominator of which is the Index  published for the same
month of the preceding year.

        "COMPANY" shall have the meaning set forth in the introductory paragraph
of this Agreement, and shall include Subsidiaries where appropriate.

        "COMPETITIVE  BUSINESS"  shall  have the  meaning  set forth in  Section
10(a).

        "CONFIDENTIAL INFORMATION" shall have the meaning set forth in Section
10(c).

        "DISABILITY" of the Executive means that, as a result of the Executive's
incapacity  due to physical or mental  illness,  the  Executive  shall have been
absent from his duties on a full time basis for six (6) consecutive  months,  or
for an aggregate of nine (9) months in any consecutive twelve (12) month period,
and a physician  selected  by the  Executive  is of the  opinion  that (a) he is
suffering from "total  disability"  and (b) he will qualify for Social  Security
Disability Payments and (c) within thirty (30) days after written notice thereof
is given by the Company to the Executive  (which notice may be given at any time
after the end of such six (6) or twelve (12) month periods) the Executive  shall
not have returned to the performance of his duties on a full-time basis. (If the
Executive is prevented from  performing  his duties because of Disability,  upon
request  by the  Company  the  Executive  shall  submit to an  examination  by a
physician selected by the Company,  at the Company's expense,  and the Executive
shall  also  authorize  his  personal  physician  to  disclose  to the  selected
physician all of the Executive's medical records).

        "EMPLOYMENT   COMMENCEMENT  DATE"  means  the  effective  date  of  this
Agreement.

        "EMPLOYMENT  PERIOD"  means that  period  commencing  on the  Employment



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Commencement Date and ending on the Employment Termination Date.

        "EMPLOYMENT  TERMINATION  DATE"  means  the date the  Employment  Period
terminates as provided in Section 11.

        "EXECUTIVE" shall have the meaning set forth in the introductory
paragraph of this Agreement.

        "FISCAL YEAR" means the fiscal year of the Company.

        "NET  INCOME"  shall mean the net income of the  Company  for any Fiscal
Year as reflected in its annual financial statements prepared in accordance with
generally  accepted  accounting  principals  and  audited by BDO Seidman or such
other  accounting firm of national  reputation as may be selected by the Company
from time to time.

        "NOTICE OF TERMINATION" shall have the meaning set forth in Section
11(a)(1).

        "RESTRICTED PERIOD" shall have the meaning set forth in Section 10(a).

        "SCHEDULED  EMPLOYMENT  TERMINATION DATE" means the later of (a) the day
immediately preceding the third (3rd) anniversary of the Employment Commencement
Date or (b) such date as is specified by either the Company or the  Executive in
a Notice of  Termination  delivered  for the  purpose  of fixing  the  scheduled
Employment  Termination  Date,  provided the date so specified shall be at least
three (3) years after the date such Notice of Termination is so delivered.

        "SUBSIDIARIES" means wholly owned subsidiaries of the Company, if any.

        Section  2.   EMPLOYMENT  AND  TERM.  The  Company  hereby  employs  the
Executive,  and the Executive hereby accepts such employment by the Company, for
the purposes and upon the terms and conditions contained in this Agreement.  The
term of such employment shall be for the Employment Period.

Section 3.  EMPLOYMENT  CAPACITY  AND DUTIEs.  The  Executive  shall be employed
throughout the Employment  Period as the Chairman of the Company.  The Executive
shall  have the duties  and  responsibilities  incumbent  with the  position  of
Chairman of the Company.  Accordingly, and not by way of limitation, as Chairman
of the Company,  the Executive shall  superintend and manage the business of the
Company and  coordinate  and  supervise the work of its other  officers,  employ
agents,  professional  advisors and  consultants  and perform all functions of a
general manager of the Company's business.  The Company agrees that it will not,
without the  Executive's  written  consent,  relocate  its  principal  executive
offices to a location  outside  Miami,  Florida or require the  Executive  to be
based anywhere other than the Company's principal executive offices,  except for
required travel on the Company's business.

        Section 4. EXECUTIVE  PERFORMANCE  COVENANTS.  The Executive accepts the
employment described in Section 3 and agrees to devote his full working time and
efforts  (except for absences due to illness and  appropriate  vacations) to the
business and affairs of the Company and the performance of the aforesaid  duties
and  responsibilities.  However,  nothing in this  Agreement  shall preclude the
Executive  from  devoting a reasonable  amount of his time and efforts to civic,
community, charitable, professional and trade association affairs and matters.

        Section 5. COMPENSATION.  The Company shall pay to the Executive for his
services  hereunder,  the compensation  hereinafter  provided in this Section 5.


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Such  compensation  shall be paid to the Executive at the time and in the manner
as provided below.

                (a)  BASE  COMPENSATION.  The  Executive  shall  be  paid  "BASE
COMPENSATION"  for each Fiscal Year at an annual rate of One Hundred  Thirty-Two
Thousand and Seven Hundred Fifty ($132,750) dollars in twenty-six (26) bi-weekly
equal  installments.  The Base Compensation (i) may be increased (but may not be
decreased)  at any time or from time to time by action of the Board of Directors
or the  Compensation  Committee,  and  (ii)  shall  be  increased  by  the  COLA
Adjustment annually as of the beginning of each Fiscal Year, commencing with the
Fiscal Year beginning in 2000. The Base Compensation  shall be pro-rated for any
Fiscal Year hereunder which is less than a full Fiscal Year.

                (b)  BONUS.  The Executive  shall be paid a bonus  ("BONUS")  as
determined by the Board of Directors.

        Section 6.  REIMBURSEMENT  OF EXPENSES.  The Company shall reimburse the
Executive  for his  reasonable  expenses  incurred in providing  services to the
Company,  including  expenses for travel,  entertainment  and similar items,  in
accordance with the Company's  reimbursement policies as determined from time to
time by the Board of Directors.  If there is a dispute as to the  eligibility of
an expense for  reimbursement  in accordance  with the  Company's  reimbursement
policies,  then such expense shall be determined to be  reimbursable if approved
by a majority of the Board of Directors.

        Section 7. EMPLOYEE BENEFITS,  VACATIONS.  During the Employment Period,
the  Executive  shall receive the benefits and enjoy the  perquisites  described
below:

                (a)  INSURANCE BENEFITS. The Company shall provide the Executive
with  medical  insurance,   life  insurance,   health  and  accident  insurance,
disability  insurance,  director and officer  insurance in amounts not less than
the  coverage  in  effect as of June 1, 1999  (collectively  referred  to as the
"INSURANCE BENEFITS").

                (b)  VACATIONS.  The Executive  shall be entitled in each Fiscal
Year to a vacation of four (4) weeks twenty (20 working days), during which time
his  compensation  shall be paid in full, and such holidays and other nonworking
days  as are  consistent  with  the  policies  of  the  Company  for  executives
generally.

                (c) AUTOMOBILE ALLOWANCE.  The Executive shall be entitled to an
automobile allowance of Seven Hundred Fifty ($750.00) Dollars per month.

                (d)  BENEFIT   PLANS.   The  Executive   shall  be  entitled  to
participate  in all benefit plans that may be  established  from time to time by
the Company.

        Section 8.   STOCK OPTIONS.  The Company shall provide to the Executive,
pursuant to the  Stock  Option  Addendum  attached  hereto,  stock options  (the
"STOCK OPTIONS") to acquire common shares of the Company ("COMMON SHARES").

        Section 9.   COMPANY LIFE INSURANCE;  MEDICAL EXAMINATIONS.  At any time
during the Employment Period, the Company may, in its discretion,  apply for and
procure  as  owner  and  for  its  own  benefit,  insurance  on the  life of the
Executive,  in  such  amounts  and in such  form or  forms  as the  Company  may
determine.  The Executive shall have no right to any interest in any such policy
or policies, but he shall, at the request of the Company, submit to such medical
examinations, supply such information and execute such applications, instruments
and other  documents as reasonably  may be required by the insurance  company or
companies to whom the Company has applied for such insurance.

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        If requested by the Company,  the Executive shall submit to at least one
medical  examination  during each Fiscal year at such  reasonable time and place
and by a physician or physicians determined and selected by the Company. All the
costs and expenses of said medical examination,  including transportation of the
Executive to the place of examination and return, shall be paid by the Company.

        The  Executive  shall be  entitled  to a copy of all  reports  and other
information  provided to the Company in connection with any examination referred
to in this  Section 9. Any failure to pass any such  medical  examination  or to
meet any health  criteria or medical  standard  shall not of itself be cause for
termination of the Employment Period by the Company.

        Section 10.  CERTAIN COMPANY PROTECTION PROVISIONS. The below provisions
apply for the protection of the Company.

                (a)  NONCOMPETITION.    During   the   Restricted   Period   (as
hereinafter  defined),  the Executive  shall not directly or indirectly  compete
with the  Company by  owning,  managing,  controlling  or  participating  in the
ownership,  management  or control of, or be employed or engaged by or otherwise
affiliated or associated with, any Competitive Business in any location in which
the Company is doing  business as of the  Employment  Termination  Date. As used
herein, the term "RESTRICTED PERIOD" means the Employment Period and a period of
one (1) year thereafter.  As used herein, a "COMPETITIVE  BUSINESS" is any other
corporation,  partnership,  proprietorship,  firm, association or other business
entity  which is engaged in any  business  from which the Company  derives  five
percent (5%) or more of its consolidated  revenues during the twelve (12) months
preceding the Employment  Termination  Date or in which the Company has invested
five  percent  (5%) or more of its  total  assets  as of the  time in  question,
provided,  however,  that  ownership  of not more than five  percent (5%) of the
stock of any  publicly  traded  company  shall not be deemed a violation of this
provision.

                (b)  NON-INTERFERENCE.   During  the  Restricted   Period,   the
Executive  shall not induce or solicit any employee of the Company or any person
doing  business with the Company to terminate his or her  employment or business
relationship with the Company or otherwise interfere with any such relationship.

                (c)  CONFIDENTIALITY.  The  Executive  agrees  and  acknowledges
that, by reason of the nature of his duties as an officer and employee,  he will
have or may have  access to and  become  informed  of  confidential  and  secret
information  which  is  a  competitive  asset  of  the  Company   ("CONFIDENTIAL
INFORMATION"), including without limitation, technology, any lists of customers,
financial statistics,  research data or any other statistics and plans contained
in profit  plans,  capital  plans,  critical  issue  plans,  strategic  plans or
marketing  or operation  plans or other trade  secrets of the Company and any of
the  foregoing  which belong to any person or company but to which the Executive
has had access by reason of his employment  relationship  with the Company.  The
Executive  agrees  faithfully  to keep in  strict  confidence,  and not,  either
directly or indirectly,  to make known, divulge, reveal, furnish, make available
or use (except for use in the regular course of his employment  duties) any such
Confidential   Information.   The  Executive   acknowledges  that  all  manuals,
instruction  books,  price lists,  information and records and other information
and aids relating to the  Company's  business,  and any and all other  documents
containing Confidential Information furnished to the Executive by the Company or
otherwise  acquired or  developed  by the  Executive,  shall at all times be the
property  of the  Company.  Upon  termination  of  the  Employment  Period,  the
Executive  shall return to the Company any such property or documents  which are
in his  possession,  custody or control,  but his obligation of  confidentiality


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shall survive such  termination  of the  Employment  Period until and unless any
such  Confidential  Information  shall  have  become,  through  no  fault of the
Executive,  generally known to the trade. The obligations of the Executive under
this  subsection are in addition to, and not in limitation or preemption of, all
other obligations of confidentiality which the Executive may have to the Company
under general legal or equitable principles.

                (d)  REMEDIES.  It is expressly  agreed by the Executive and the
Company that these  provisions are reasonable for purposes of preserving for the
Company its business,  goodwill and proprietary  information.  It is also agreed
that if any provision is found by a court having jurisdiction to be unreasonable
because  of  scope,  area or time,  then  that  provision  shall be  amended  to
correspond in scope, area and time to that considered  reasonable by a court and
as  amended  shall  be  enforced  and  the  remaining  provisions  shall  remain
effective.  In the event any breach of these  provisions by the  Executive,  the
parties  recognize and  acknowledge  that a remedy at law will be inadequate and
the Company may suffer irreparable  injury. The Executive  acknowledges that the
services to be rendered by him are of a character  giving them  peculiar  value,
the loss of which cannot be adequately  compensated for in damages;  accordingly
the Executive  consents to injunctive  and other  appropriate  equitable  relief
without the posting of a bond upon the  institution of  proceedings  therefor by
the Company in order to protect the  Company's  rights.  Such relief shall be in
addition  to any other  relief to which the Company may be entitled at law or in
equity.  The provisions of Section 10(a),  10(b),  10(c) and 10(d) shall survive
the termination of this Agreement.

        Section 11.  TERMINATION OF EMPLOYMENT.

                (a)  Notice of Termination; Employment Termination Date.

                     (1)  Any termination of the  Executive's  employment by the
Company or the Executive  shall be communicated by written Notice of Termination
to the other  party  thereto.  For  purposes  of this  Agreement,  a "NOTICE  OF
TERMINATION"  shall mean a notice which shall indicate the specific  termination
provision in this Agreement relied upon and shall set forth in reasonable detail
the facts and circumstances claimed to provide a basis for termination under the
provision so  indicated.  Furthermore,  either the  Executive or the Company may
give a Notice of  Termination  to the other party for the purpose of terminating
this Agreement, as such, without terminating the Executive's employment with the
Company which Notice of Termination  shall have the effect of  terminating  this
Agreement on the Scheduled Employment  Termination Date as in effect on the date
of giving such Notice of Termination.

                     (2)  "EMPLOYMENT  TERMINATION  DATE" shall mean the date on
which the Employment  Period and the Executive's right and obligation to perform
employment  services for the Company shall terminate effective upon the first to
occur of the following,  it being understood that in no event may the Employment
Period be terminated other than as the result of one of the following events:

                (A)  If  the   Executive's   employment   is   terminated   for
                     Disability,  the date  which is  thirty  (30)  days  after
                     Notice  of  Termination   is  given   (provided  that  the
                     Executive  shall not have returned to the  performance  of
                     his duties on a  full-time  basis  during such thirty (30)
                     day period);

                (B)  If  the  Executive's   employment  is  terminated  by  the
                     Executive for Good Reason or otherwise by voluntary action
                     of the Executive (see Section  11(f)),  the date specified
                     in the Notice of Termination,  which date (except with the
                     written  consent of the Company to the contrary) shall not
                     be more  than  sixty  (60)  days  after  the date that the
                     Notice of Termination is given;


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                (C)  The death of the Executive;

                (D)  The Scheduled Employment Termination Date:

                (E)  If the Executive's employment is terminated by the Company
                     for  Cause  (see  Section  11(b)(1)),  the date on which a
                     Notice of  Termination  is given;  provided that if within
                     thirty (30) days after any Notice of  Termination is given
                     the party  receiving such Notice of  Termination  notifies
                     the other  party  that a  dispute  exists  concerning  the
                     termination,  the Employment Termination Date shall be the
                     date on which the dispute is finally determined, either by
                     mutual written agreement of the parties,  by a binding and
                     final arbitration  award or by a final judgment,  order to
                     decree of a court of competent  jurisdiction (the time for
                     appeal  therefrom having expired and no appeal having been
                     perfected); and

                (F)  If the Executive's employment is terminated by the Company
                     other  than  for  Cause,   Disability   or  death  of  the
                     Executive, the date specified in the Notice of Termination
                     which  date  (except  with  the  written  consent  of  the
                     Executive  to the  contrary)  shall not be more than sixty
                     (60) days after the date that the Notice of Termination is
                     given.

                (b)  TERMINATION FOR CAUSE:

                     (1)  The Company may terminate the  Executive's  employment
and the Employment  Period for Cause.  For the purposes of this  Agreement,  the
Company shall have "CAUSE" to terminate  employment  hereunder only (i) upon the
willful and  continued  failure by the  Executive  substantially  to perform his
duties with the Company (other than any such failure  resulting from  incapacity
due to mental or physical  illness) or (ii) conviction of a felony or fraud upon
the assets of the  Company  and only after a demand in writing  for  substantial
performance  is delivered by the Board of Directors,  which demand  specifically
identifies  the  manner  in which  the  Board  of  Directors  believes  that the
Executive has not substantially  performed his duties,  and such failure results
in demonstrably material injury to the Company. The Executive's employment shall
in no event be  considered  to have been  terminated by the Company for Cause if
such termination took place as the result of (i) bad judgment or negligence,  or
(ii) any act or  omission  without  intent  of  gaining  therefrom  directly  or
indirectly a profit to which the  Executive was not legally  entitled,  or (iii)
any act or omission believed in good faith to have been in or not opposed to the
interest  of the  Company,  or (iv) any act or  omission  in  respect of which a
determination is made that the Executive met the applicable  standard of conduct
prescribed for indemnification or reimbursement or payment of expenses under the
Code of Regulations of the Company or the laws of the State of Florida,  in each
case as in effect at the time of such act or omission.  The Executive  shall not
be deemed to have been  terminated  for Cause  unless and until there shall have
been  delivered  to him a copy of a resolution  duly adopted by the  affirmative
vote of not less than three-quarters (3/4) of the entire membership of the Board
of  Directors  at a meeting  of the Board of  Directors  called and held for the
purpose  (after not less than thirty (30) days' written  notice to the Executive
and an  opportunity  for him together  with his counsel,  to be heard before the
Board of Directors,  such notice of meeting to indicate the specific termination
provision of this  Agreement  relied upon and specify in  reasonable  detail the
facts and  circumstances  claimed to provide a basis for  termination  under the
provision so indicated),  finding that in the good faith opinion of the Board of
Directors  the Executive was guilty of conduct set forth above in clauses (i) or
(ii) of the second  sentence of this paragraph and  specifying  the  particulars
thereof in detail.


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                     (2) If the Executive's  employment  shall be terminated for
Cause,  the  Company  shall pay the  Executive  (A) within ten (10) days of such
termination,  his unpaid Base  Compensation  through the Employment  Termination
Date at the rate in effect at the time Notice of  Termination  is given plus (B)
within  ten  (10)  days  after  issuance  of  the  Company's  audited  financial
statements for the Fiscal Year in which the Employment  Termination Date occurs,
a pro-rata  share of any Bonus computed with respect to the Fiscal Year in which
occurs the Employment Termination Date as if such termination had not occurred.

                (c)  TERMINATION FOR  DISABILITY.  The Company may terminate the
Executive's employment because of the Disability of the Executive and thereafter
shall pay to the Executive (or his successors) (1) his unpaid Base  Compensation
through the sixth (6th) full month following the Employment  Termination Date at
his  then  effective  Base  Compensation  rate,  plus (2) an  amount  equal to a
pro-rata  share of any Bonus  calculated  through  the sixth  (6th)  full  month
following the  Employment  Termination  Date as though all of such six (6) month
period were part of the Fiscal Year in which occurred the Employment Termination
Date, (but otherwise as though such termination had not occurred).  In addition,
the  Executive  shall be  entitled  to amounts  and the  benefits  specified  in
Paragraphs (2) and (3) of Section 11(g) of this Agreement.

                (d)  TERMINATION  UPON  EXECUTIVE'S  DEATH.  In the event of the
Executive's  death,  the  Company  shall pay to the  Executive's  estate (1) any
unpaid  amount  of Base  Compensation  through  the  date of  death  at the then
effective Base  Compensation rate plus (2) an amount equal to the pro-rata share
of any Bonus  calculated  with  respect  to the  Fiscal  Year in which the death
occurs. All previously granted stock options,  rights, warrants and awards shall
fully vest on the death of the  Executive,  except  that the  provisions  of the
Company's  Stock  Incentive  Plan and any other  benefit plan shall  control the
benefits and awards covered thereby.

                (e)  TERMINATION  DUE TO  INSOLVENCY.  The Company may terminate
the  Executive's  employment  because  of the  Company's  inability  to pay  its
financial  obligations,  whether or not such inability results in a voluntary or
involuntary   bankruptcy  filing  or  any  similar  action   (collectively,   an
"INSOLVENCY")  and thereafter  shall pay to the Executive (or his successor) his
unpaid Base  Compensation  through the twelfth  (12th) full month  following the
Employment Termination Date at his then effective Base Compensation rate.

                (f)  Termination of Employment by the Executive.

                     (1) The Executive may  terminate  his  employment  for Good
Reason and receive the payments and benefits  specified in Section  11(g) in the
same manner as if the Company had  terminated  his  employment.  For purposes of
this  Agreement,  "GOOD  REASON" will exist if any one or more of the  following
occur:

                (A)  Failure  by the  Company  to honor  any of its  obligations
                     under this Agreement,  including,  without limitation,  its
                     obligations  under  Section  3  (EMPLOYMENT   CAPACITY  AND
                     DUTIES),   Section  4  (EXECUTIVE  PERFORMANCE  COVENANTs),
                     Section  5  (COMPENSATION),  Section  6  (REIMBURSEMENT  OF
                     EXPENSES),  Section 7 (EMPLOYEE BENEFITS,  VACATIONS,  LIFE
                     INSURANCE),   Section  8  (STOCK   OPTIONS),   Section   12
                     (INDEMNIFICATION)  and Section 14 (SUCCESSORS AND ASSIGNS).
                     Notwithstanding the foregoing,  if the Company's failure to
                     honor its  obligations  hereunder are due to an Insolvency,
                     then  the  Executive  shall  be  entitled  to  receive  the
                     payments and benefits specified in Section 11(e) hereto.


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                (B)  Any purported termination by the Company of the Executive's
                     employment  that is not  effected  pursuant  to a Notice of
                     Termination  satisfying the  requirements  of Section 11(a)
                     above  and,  for  purposes  of  this  Agreement,   no  such
                     purported termination shall be effective.

                (C)  If there is a Change in Control of the  Company (as defined
                     below) and the employment of the Executive is  concurrently
                     or  subsequently  terminated  (i)  by the  Company  without
                     Cause,  (ii) by service of a Notice of Termination or (iii)
                     by  the   resignation  of  the  Employee   because  he  has
                     reasonably   determined  in  good  faith  that  his  title,
                     authorities,  responsibilities, salary, bonus opportunities
                     or  benefits  have been  materially  diminished,  or that a
                     material  adverse  change  in his  working  conditions  has
                     occurred or the Company has breached  this  Agreement.  For
                     the purpose of this Agreement, a "CHANGE IN CONTROL" of the
                     Company has occurred when: (x) any person  (defined for the
                     purposes of this  Section 11 to mean any person  within the
                     meaning of Section 13(d) of the Securities  Exchange Act of
                     1934 (the "EXCHANGE  ACT")),  other than the Company,  Nyer
                     Medical Group, Inc. a Florida  corporation,  or an employee
                     benefit plan  established  by the Board of Directors of the
                     Company,  acquires,  directly or indirectly, the beneficial
                     ownership  (determined  under Rule 13d-3 of the regulations
                     promulgated by the Securities and Exchange Commission under
                     Section 13(d) of the Exchange Act) securities issued by the
                     Company  having twenty  percent (20%) or more of the voting
                     power of all of the voting securities issued by the Company
                     in the  election of directors at the meeting of the holders
                     of voting securities to be held for such purpose;  or (y) a
                     majority  of the  directors  elected at any  meeting of the
                     holders of voting securities of the Company are persons who
                     were  not  nominated  for  such  election  by the  Board of
                     Directors of the Company or a duly constituted committee of
                     the Board of Directors of the Company  having  authority in
                     such  matters;  or (z) the Company  merges or  consolidates
                     with  or  transfers  substantially  all  of its  assets  to
                     another person.

                     (2) The  Executive  shall  have the right  voluntarily  to
terminate his  employment for any other reason than for Good Reason prior to the
Scheduled  Employment  Termination Date, and if the Executive shall so terminate
his employment,  he shall be entitled only to payment of the amounts which would
be payable under Section 11(b)(2) had he been terminated for Cause.

                (g)  COMPENSATION UPON TERMINATION OTHER THAN FOR CAUSE.

                     (1) If the Company  terminates the Executive's  employment
for any  reason  other than for Cause,  as set forth in  Section  11(b)  herein,
Disability,  as set forth in Section  11(c)  herein,  or Death,  as set forth in
Section 11(d) herein,  Insolvency,  as set forth in Section 11(e) herein,  or if
the Executive terminates his employment for Good Reason, as set forth in Section
11(f)(1)  herein (but not a termination  voluntarily by the Executive other than
for Good  Reason,  as set forth in Section  11(f)(2)  herein),  then the Company
shall pay to the Executive the following amounts:

                (A)   (1) His unpaid Base  Compensation  through the  Employment
                      Termination  Date at his then effective Base  Compensation
                      Rate,  plus (2) an amount equal to a pro-rata share of the
                      amount of any Bonus  payable  to him with  respect  to the
                      Fiscal  Year in which  occurs the  Employment  Termination
                      Date.


                                      -8-
<PAGE>

                (B)  In  addition,  the  Company  shall  pay  to  the  Executive
                     promptly  in a single  lump sum in cash an amount  equal to
                     the  product  of (1) two,  multiplied  by (ii)  100% of the
                     aggregate  total  amount  which would have been  payable to
                     Executive  under  Section 5 for the entire  Fiscal  Year in
                     which  occurs  the  Employment  Termination  Date as if his
                     employment had not been terminated  (and without  deduction
                     or offset for any  amounts  actually  paid for such  Fiscal
                     Year on account of Base Compensation or Bonus under Section
                     5, this Section 11 or otherwise), and assuming for purposes
                     of  calculating  (x)  the  Base  Compensation,  100% of the
                     amount  thereof at the annual rate  payable for such Fiscal
                     Year  pursuant  to  Section  5(a)  and (y) the  Bonus,  the
                     largest amount  thereof  accrued or paid for any of the two
                     most recently completed Fiscal Years.

                (C)  The  Company  shall  also pay all legal  fees and  expenses
                     incurred  as a result of such  termination  (including  all
                     such fees and expenses,  if any,  incurred in contesting or
                     disputing  any such  termination,  in  seeking to obtain or
                     enforce any right or benefit provided by this Agreement, or
                     in interpreting this Agreement).

                (D)  The  Executive  shall be under no  obligation to seek other
                     employment and there shall be no offset against any amounts
                     due the  Executive  under this  Agreement on account of any
                     remuneration attributable to any subsequent employment that
                     the  Executive  may obtain (any  amounts due under  Section
                     11(g)  are  in  the  nature  of  severance   payments,   or
                     liquidated damages, or both, and are not in the nature of a
                     penalty).

                     (2) Unless  Executive is terminated for Cause,  the Company
shall maintain in full force and effect,  for the Executive's  continued benefit
through the  Scheduled  Employment  Terminate  Date,  all active and  retirement
Insurance  Benefits and other benefit  programs or  arrangements in which he was
entitled to participate  immediately prior to the Scheduled Employment Terminate
Date provided that continued  participation  is possible under the general terms
and provisions of such plans and programs.  In the event that  participation  in
any such plan or program is barred,  the  Company  shall  arrange to provide him
with  benefits  substantially  similar to those  which he is entitled to receive
under such plans and programs.

                     (3) Unless the Executive is  terminated  for Cause which is
not contested by the Executive, the Company shall allow the Executive at Company
expense,  to continue to utilize the  services of BDO  Seidman,  and/or  another
accountant or attorney  (including fees and expenses through all appeals) of his
choice for  assistance in enforcing  this  Agreement and  preparation of his tax
returns for the year following termination of employment.

                (h)  COMPENSATION  UPON  DISABILITY.  During any period that the
Executive fails to perform his duties hereunder as a result of incapacity due to
physical  or  mental  illness,  he shall  continue  to  receive  his  full  Base
Compensation at the rate then in effect and his full Bonus calculated  according
to the  provisions  of  Section  5(b) all until  this  Agreement  is  terminated
pursuant to Section 11(c) hereof.

        Section  12. INDEMNIFICATION.  As an  employee,  officer and director of
the Company,  the Executive  shall be indemnified  against and the Company shall
maintain director and officer insurance in amounts not less than the coverage in


                                      -9-
<PAGE>


effect  as of June 1,  1999  for all  liabilities,  damages,  fines,  costs  and
expenses to the fullest extent to which  employees,  officers and directors of a
corporation  organized  under the laws of Florida may be indemnified as the same
may be amended from time to time (or any subsequent statute of similar tenor and
effect), subject to the terms and conditions of such statute.

        Section  13. ARBITRATION. Any dispute or controversy arising under or in
connection  with this Agreement  shall be settled  exclusively by arbitration in
Miami,  Florida  in  accordance  with  the  rules  of the  American  Arbitration
Association  then in effect;  provided that all  arbitration  expenses  shall be
borne by the Company. Notwithstanding the pendency of any dispute or controversy
concerning  termination or the effects thereof, the Company will continue to pay
the Executive his full compensation in effect  immediately  before any Notice of
Termination giving rise to the dispute was given (including, but not limited to,
Base Salary and Bonus) and continue him as a  participant  in all  compensation,
benefit and  Insurance  Benefits in which he was then  participating,  until the
dispute is finally resolved.  Judgment may be entered on the arbitrators'  award
in any court having jurisdiction; provided, however, that the Executive shall be
entitled  to  seek  specific  performance  of his  right  to be paid  until  the
Employment  Termination  Date during the pendency of any dispute or  controversy
arising under or in connection with this Agreement.

        Section 14.  SUCCESSORS  AND ASSIGNS.  Except as  hereinafter  expressly
provided,  the  agreements,  covenants,  terms and  provisions of this Agreement
shall bind the  respective  heirs,  executors,  administrators,  successors  and
assigns  of the  parties.  Specifically,  and  not by way of  limitation  of the
foregoing,  the  Executive  shall be bound by the terms and  conditions  of this
Agreement to any  successor  assignee of the  Company's  rights and  obligations
hereunder  as a result of any merger,  consolidation  or sale or lease of all or
substantially  all of the  Company's  business  sand  assets.  If any  successor
(whether direct or indirect, by purchase, merger, consolidation or otherwise) to
all or  substantially  all of the business  and/or assets of the Company  fails,
concurrently with the effectiveness of any such succession,  to agree in writing
in form and substance  reasonably  satisfactory  to the  Executive  expressly to
assume and agree to perform  this  Agreement  in the same manner and to the same
extent that the Company would be required to perform if no such  succession  had
taken place, then the Executive shall have the right, effected by notice to such
successor  not later  than  ninety  (90) days  after the  effectiveness  of such
succession,  to terminate  the  Employment  Period under Section 11(f) as though
such  failure  was an uncured  breach by the  Company of a material  covenant or
agreement of the Company contained in this Agreement.

        If the  Executive  should  die  while any  amounts  are  payable  to him
hereunder,  or if by  reason  of  his  death  payments  are  to be  made  to him
hereunder,  then this Agreement shall inure to the benefit of and be enforceable
by the Executive's executors, administrators,  heirs, distributees, devisees and
legatees and all amounts payable hereunder shall then be paid in accordance with
the  terms  of this  Agreement  to the  Executive's  devisee,  legatee  or other
designee or, if there is no such designee, to his estate.

        This  Agreement is personal in nature and neither of the parties  hereto
shall,  without the consent of the other,  assign or transfer this  Agreement or
any rights or obligations  hereunder,  except as  hereinbefore  provided in this
Section 14. Without  limiting the foregoing,  the  Executive's  right to receive
payments  hereunder shall not be assignable or transferable,  whether by pledge,
creation of a security interest or otherwise,  other than a transfer by his will
or by the laws of descent  or  distribution,  and in the event of any  attempted
assignment  or transfer  contrary to this  paragraph  the Company  shall have no
liability to pay to the purported assignee or transferee any amount so attempted
to be assigned or transferred.

        As used in this  Agreement,  the  "Company"  shall  mean the  Company as
hereinbefore  defined  and  any  successor  to its  business  and/or  assets  as


                                      -10-
<PAGE>


aforesaid  which  executes and delivers the agreement  provided for in the first
paragraph of this Section 14 or which  otherwise  becomes bound by all the terms
and provisions of this Agreement by operation of law.

        Section 15.  NOTICES.  Any  notice or other  communication  required  or
desired  to be  given  hereunder  shall  be  in  writing  and  shall  be  deemed
sufficiently  given when  personally  delivered  or when  mailed by first  class
certified mail, return receipt requested and postage prepaid,  or when delivered
if by recognized  overnight  delivery service  addressed to the parties at their
respective  addresses set forth under their respective  signatures below or such
other person or addresses as shall be given by notice of any party.

        Section  16. WAIVER;  REMEDIES  CUMULATIVE.  No  waiver  of any right or
option  hereunder  by any party shall  operate as a waiver of any other right or
option, or the same right or option as respects any subsequent  occasion for its
exercise,  or of any legal remedy.  No waiver by any party of any breach of this
Agreement  or of any  agreement  or covenant  contained  herein shall be held to
constitute  a waiver of any other breach or a  continuation  of the same breach.
All remedies provided by this Agreement are in addition to all other remedies by
it or the law provided.

        Section 17.  GOVERNING LAW; SEVERABILITY.  This Agreement is made and is
expected  to be  performed  in  Florida,  and  the  various  terms,  provisions,
covenants  and  agreements,  and the  performance  thereof,  shall be construed,
interpreted  and enforced  under and with  reference to the laws of the State of
Florida.  It is the  intention of the Company and the  Executive to comply fully
with all laws and matters of public policy relating to employment agreements and
restrictive  covenants,  and this Agreement shall be construed consistently with
such laws and public policy to the extent possible. If and to the extent any one
or more  covenants,  agreements,  terms and  provisions of this Agreement or any
portion or portions thereof shall be held invalid or unenforceable by a court of
competent jurisdiction,  then such covenants,  agreements,  terms and provisions
(or portions  thereof) shall be deemed  separable from the remaining  covenants,
agreements,  terms and provisions of this Agreement and such holding shall in no
way  affect  the  validity  or  enforceability  of any of the  other  covenants,
agreements, terms and provisions hereof.

        Section 18.  MISCELLANEOUS.   This  Agreement   constitutes  the  entire
understanding  of the parties  hereto with respect to the subject matter hereof.
This  Agreement  may not be  modified,  changed or  amended  except in a writing
signed by each of the parties  hereto.  This Agreement may be signed in multiple
counterparts,  each of which shall be deemed an original hereof. The captions of
the several  sections and  subsections  of this  Agreement are not a part of the
context hereof,  are inserted only for convenience in locating such sections and
subsections and shall be ignored in construing this Agreement.



                        [SIGNATURES FOLLOW ON NEXT PAGE]

                                      -11-
<PAGE>


        IN WITNESS WHEREOF, the Company and the Executive have executed multiple
counterparts of this Agreement.


Company:                                   Executive:

GENETIC VECTORS, INC.
---------------------                      ------------------------------------
Miami, Florida                             Name:   Mead M. McCabe, Jr.
                                           Address:
                                                   ----------------------------
                                                          Miami,  Florida
By:
   -----------------------------------
Name:
Title:


and


By:
   -----------------------------------
Name:
Title:         Secretary



                  [STOCK OPTION ADDENDUM FOLLOWS ON NEXT PAGE]




                                      -12-
<PAGE>




                              STOCK OPTION ADDENDUM
                                       TO
                         EXECUTIVE EMPLOYMENT AGREEMENT
                                     BETWEEN
                              GENETIC VECTORS, INC.
                                       AND
                               MEAD M. MCCABE, SR.


                                                              As of July 1, 1999


        Subject  to  all of the  terms  and  conditions  contained  herein,  the
undersigned GENETIC VECTORS, INC., a Florida corporation (the "COMPANY"), hereby
grants to MEAD M.  McCABE,  SR.  (the  "EXECUTIVE")  the  following  options  to
purchase shares (the "EXECUTIVE  OPTION SHARES") of the Company's  common stock,
without par value ("COMMON SHARES") as follows:

        The Company and Executive hereby agree as follows:

        Subject to all of the terms and conditions contained herein, the Company
hereby grants to Executive the following  performance-based  options to purchase
Common Shares:

        1.  OPTIONS. The Company hereby grants to Executive the right and option
to purchase  from the Company  10,000  Common  Shares (the  "OPTIONS")  upon the
following terms and conditions:

           (a) TERM OF OPTIONS.  The Options shall be effective  throughout  the
Employment  Period and for a period of one hundred  eighty (180) days  following
the Employment Termination Date.

           (b) PURCHASE  PRICE.  The purchase  price for the Options shall be at
least one hundred  percent  (100%) of the closing  price of Common Shares of the
Company as of the date of grant.

           (c) OPTIONS  NON-TRANSFERABLE.  The option rights with respect to the
Options are  non-transferable and are personal to Executive and may be exercised
only by Executive and by no one else.

           (d) TIME OF  EXERCISE.  Except  as set  forth  herein,  there  are no
conditions  to the  exercise  or the  exercisability  by  the  Executive  of the
Options.

        2.  SECURITIES  ACT,  ETC. In the absence of an  effective  Registration
Statement  under the Securities Act of 1933, as from time to time in effect (the
"ACT"),  relating  thereto,  the  Company  shall not be  required  to register a
transfer  of shares  delivered  or  deliverable  upon  exercise  of the  Options
("DELIVERED  SHARES") on its books unless the Company  shall have been  provided
with an  opinion  of  counsel  satisfactory  to it prior to such  transfer  that
registration  under the Act is not required in connection  with the  transaction
resulting in such transfer.  Each  certificate  evidencing  Delivered  Shares or
issued  upon  any  transfer  of  Delivered  Shares  shall  bear  an  appropriate
restrictive  legend,  except  that  such  certificate  shall  not  bear  such  a
restrictive legend if the opinion of counsel referred to above is to the further
effect that such legend is not  required in order to establish  compliance  with
the provisions of the Act. Nothing in this paragraph 2 shall modify or otherwise
effect the provisions applicable to the Delivered Shares.


                                      -13-
<PAGE>

        3.  TERMINATION, EXERCISE, ETC.

            (a)  The  Options shall  expire  and  terminate,  to the  extent not
previously exercised, as to all Executive Option Shares one hundred eighty (180)
days after the  Employment  Termination  Date.  In the event of the  Executive's
death,  the Options shall be exercisable by the Executive's  estate or any trust
established solely for the benefit of one or more of the Executive's heirs (such
estate and each such  trust  being  referred  to  herein,  collectively,  as the
"Estate") during the period  beginning on the date of the Executive's  death and
ending on the one hundred  eightieth  (180th) day  thereafter.  In the event the
Executive's  employment  is terminated  other than by reason of the  Executive's
death,  the Options  shall be  exercisable  by the  Executive  during the period
beginning on the date of such termination and ending on the ninetieth (90th) day
thereafter.

            (b)  Subject  to  the  preceding   paragraph   3(a)  and  the  other
provisions of this Addendum,  the Options may, to the extent exercisable but not
previously  exercised,  be exercised at any time and from time to time, in whole
or in part, by written  notice  delivered to the Company signed by the Executive
or the Estate  thereof.  Such notice shall state the number of Option  Shares in
respect  to which the  Options  are being  exercised,  and  shall  contain  such
representations  and  warranties of the  Executive or the Estate  thereof as the
Company may then deem  necessary or desirable in order to comply with federal or
state  securities  laws  or as may  otherwise  be  reasonably  requested  by the
Company,  and shall be  accompanied  either (i) by payment in full (in cash,  by
personal  check or by any other  method  acceptable  to the Company) of the full
Exercise Price in respect thereof or (ii) delivery to the Company of a number of
shares of Common  Stock owned by the  Executive  and having a fair market  value
(determined  reasonably  and in good  faith by the Board of  Directors  and,  if
reasonably possible, prior to such exercise) equal to the full Exercise Price in
respect thereof.  In addition,  the Company shall have the right to require that
the Executive or the Estate thereof,  when exercising the Options in whole or in
part, remit to the Company an amount sufficient to satisfy any federal, state or
local withholding tax requirements (or make other  arrangements  satisfactory to
the Company  with regard to such taxes  prior to the  delivery of any  Delivered
Shares pursuant to such exercise,  including  without  limitation by withholding
Delivered Shares otherwise deliverable upon such exercise,  and, if requested by
the Executive or such Estate, the Company shall so withhold at least a number of
Delivered  Shares  requested  to be so withheld by the  Executive at the time of
such exercise.  As soon as practicable  after such notice and payment shall have
been  received,   the  Company  shall  deliver  a  certificate  or  certificates
representing  the number of  Delivered  Shares with respect to which the Options
were exercised, registered in the name of the Executive.

            (c)  All Delivered  Shares that shall be purchased upon the exercise
of the Options as provided herein shall be fully paid and non-assessable.

        4.  CERTAIN CONDITIONS.  In the event the Company (i) pays a dividend or
makes a distribution on its Common Stock, (ii) subdivides its outstanding shares
of Common Stock into a greater number of shares,  (iii) combines its outstanding
shares of Common Sock into a smaller number of shares, (iv) makes a distribution
on its Common Stock in shares of its capital stock other than Common Stock,  (v)
issues by  reclassification of its Common Stock any shares of its capital stock,
or (vi) consummates any merger reorganization or consolidation pursuant to which
any  securities or other  consideration  is issued to the holders of outstanding
shares of capital stock of the Company (each an "ADJUSTMENT  EVENT"),  then, the
Options  granted to the  Executive  hereunder  shall be so adjusted and upon the
exercise of such  Options,  the  Executive  shall be  entitled  to receive  such
securities of the Company or other  consideration  as the  Executive  would have
held  immediately  after  the  consummation  of such  Adjustment  Event  had the
Delivered  Shares issuable upon such exercise been held by the Executive on such
record date.


                                      -14-
<PAGE>

        5.  MISCELLANEOUS.  Except as specifically otherwise provided in Section
4 hereof as to  exercise  by the  Executive's  Estate,  the  Options  may not be
assigned or transferred,  in whole or in part, whether by operation of law, upon
death or otherwise,  by the Executive without the written consent of the Company
which the Company  may  withhold in its sole and  absolute  discretion,  with or
without any reason.  The Options are not intended to constitute  and  "incentive
stock  option" as that term is used in Section 422 of the Internal  Revenue Code
of 1986, as amended,  and shall not be treated as incentive  stock options.  The
Options shall be governed by and  construed in  accordance  with the laws of the
State of Florida.



                                      GENETIC VECTORS, INC.



                                      By:
                                         ---------------------------------------
                                          Name:
                                               ---------------------------------
                                          Title:
                                               ---------------------------------
















                                      -15-