EXHIBIT 10.1

April 16,
2004

Dennis
W. Harris, Ph.D
320 Chesley Avenue
Mountain View, CA 94040

Dear
Dennis:

I
am pleased on behalf of Serologicals Corporation (the "Corporation") to offer you ("you" or the "Executive") employment (the "Employment") on the terms set forth herein (the "Offer").

1.Position, Duties and Responsibilities.

a.     You
shall serve as the Vice President, Research and Development, Business Development and Chief Scientific Officer and shall be responsible for the duties as agreed
between you and the President and Chief Executive Officer, which will be outlined in a job description to be finalized shortly after your arrival. You shall report to the President and Chief Executive
Officer of the Corporation and shall be an officer of the Corporation. You shall also be a member of the Corporation's Operating Committee.

b.     You
will devote all your business time and attention to the business and affairs of the Corporation and its subsidiaries consistent with your position. Nothing herein,
however, shall preclude you from engaging in charitable and community affairs, or giving attention to your investments provided that such activities do not interfere with the performance of your
duties and responsibilities enumerated herein.

c.     Except
as otherwise specifically stated herein, you shall be subject to all of the requirements and provisions described in the Corporation's employee handbook, as it may
be amended from time-to-time.

d.     Following
any termination of your employment, upon the request of the Corporation, you shall reasonably cooperate with the Corporation in all matters relating to the
winding up of pending work on behalf of the Corporation and the orderly transfer of work to other employees of the Corporation. You shall also reasonably cooperate in the defense of any action brought
by any third party against the Corporation that relates in any way to your acts or omissions while employed by the Corporation. The Corporation shall reimburse you for your reasonable
out-of-pocket costs, if any, as permitted by law, incurred in cooperating with the Corporation.

2.Term.

Your
Employment under these terms shall commence hereunder as soon as possible but not later than May 10, 2004 (the actual date of commencement being referred to herein as the
"Effective Date") and continue for successive one (1) year periods, unless otherwise terminated pursuant to the provisions hereof.

3.Compensation and Related Matters.

a.Base Salary.You shall be paid a base salary (the "Base Salary") equal to two hundred fifty thousand dollars
($250,000) per year. The Base Salary shall be payable to you in the manner and on the date(s) on which the Corporation pays its other executives, but in no event less frequently than monthly. Based
upon performance, you shall be eligible for a salary review on April 1, 2005 and annually thereafter.

b.Incentive Compensation.You shall be entitled to an annual bonus in accordance with and subject to your
achievement of the Critical Success Factors, plus other objectives, to be developed and mutually agreed upon by you and the President and Chief Executive Officer, subject to the Board of Directors
authorizing the payment of such bonus for the given year. You shall also be eligible to participate in such bonus and incentive compensation plans of the Corporation, if any, in which other

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Vice
President-level employees of the Corporation are generally eligible to participate, as the Corporation's Board of Directors ("Board") or a Committee thereof shall determine from
time-to-time in its sole discretion, subject to and in accordance with the terms and provisions of such plans. It is understood that should you commence Employment under these
terms, you will be eligible for a pro-rated bonus for the year 2004 calculated from the Effective Date to December 31, 2004.

c.Employee Benefit Programs.You shall be eligible to participate in the employee benefit programs (subject to
their respective terms) now provided or as may hereinafter be provided by the Corporation to its executives. Current benefit programs include:



d.Stock Options.On the Effective Date you will be granted a non-qualified employee stock option
under the Corporation's Stock Incentive Plan (the "Stock Incentive Plan") to purchase forty-eight thousand (48,000) shares of the Corporation's $.01 par value common stock at an initial exercise price
equal to the fair market value of such stock on the Effective Date ("Options"). The Options shall have a term of six (6) years and, so long as you are then employed by the Corporation, the
right to exercise the Options shall vest and be fully exercisable at the rate of twenty-five percent (25%) per year commencing on the first anniversary of the Effective Date. Such Options
shall be issued pursuant to a stock option agreement entered into by you and the Corporation and shall be subject to all the other terms and conditions contained in the Stock Incentive Plan, the
provisions of which shall be determined in the sole discretion of the Board or a committee thereof. You acknowledge that the Corporation and you understand that this stock option grant is anticipated
to be the only such grant for a period of two (2) years from the Effective Date.

e.Reimbursement of Expenses.It is contemplated that in connection with your Employment hereunder, you may be
required to incur business, entertainment and travel expenses. The Corporation agrees to promptly reimburse you in full for all reasonable out-of-pocket business, entertainment
and other related expenses (including all expenses of travel and living expenses while away from home on business or at the request of, and in service of, the Corporation) incurred or expended by you
incident to the performance of your duties hereunder, provided that you properly account for such expenses in accordance with the policies and procedures established by the Board and applicable to the
executives of the Corporation.

f.Paid Time Off.You shall be entitled, in each calendar year of your Employment, to the number of paid
vacation days determined by the Corporation from time-to-time to be appropriate for its executives, but in no event less than four (4) weeks in any such year during your
Employment (pro-rated, as necessary, for partial calendar years during your Employment). You may take your allotted vacation days at such times as are mutually convenient for the
Corporation and you, consistent with the Corporation's vacation policy in effect with respect to its executives. You shall also be entitled to all paid holidays given by the Corporation to its
executives.

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4.Termination.

a.Disability of the Executive.In the event of your incapacity or inability to perform your services as
contemplated herein for an aggregate of ninety (90) days during any twelve (12) month period due to the fact that your physical or mental health shall have become impaired so as to make
it impossible in the judgment of the Corporation for you to perform the duties and responsibilities contemplated for you hereunder, the Corporation shall have the right to declare, upon two
(2) weeks prior written notice rendered to you, a disability termination, whereupon you shall receive (if you are entitled thereto) the
short and/or long-term disability benefits provided by the Corporation. In the event you have commenced receiving benefits under the Corporation's disability plans, until termination of
your employment under this Section 4(a), the Corporation shall not be obligated to pay to you with regard to Base Salary an amount greater than the difference between your Base Salary then in
effect and any such disability benefits you are then receiving.

b.Death of the Executive.In the event you die during your Employment hereunder, your Employment shall
automatically terminate without notice on the date of your death, except that your estate shall receive the death benefits, if any, provided by the Corporation.

c.Termination by the Corporation for Cause.Nothing herein shall prevent the Corporation from terminating your
Employment for Cause (as defined below). From and after the date of such termination, you shall no longer be entitled to receive the Base Salary or any other compensation which would have otherwise
been due and all Options shall terminate immediately. Any rights and benefits that you may have in respect to any other compensation or any employee benefit plans or programs of the Corporation shall
be determined in accordance with the terms of such other compensation arrangements, plans or programs, and in any event, you shall have no rights or benefits under any arrangement, plan or program
unless such arrangement, plan or program is in writing and you are specified as a participant therein. The term "for Cause", as used herein, shall mean (i) an act of dishonesty causing harm to
the Corporation or any subsidiary; (ii) the knowing disclosure of confidential information relating to the Corporation's or any subsidiary's business; (iii) habitual drunkenness or
narcotic drug addiction; (iv) conviction of, or a plea ofnolo contenderewith respect to, a felony; (v) the willful refusal to perform,
or the gross neglect of, the duties assigned to the Executive; (vi) the Executive's willful breach of any law that, directly or indirectly, affects the Corporation or any subsidiary;
(vii) the Executive's material breach of his duties following a Change in Control that do not differ in any material respect from the Executive's duties and responsibilities during the
90-day period immediately prior to such Change in Control (other than as a result of incapacity due to physical or mental illness), which is demonstrably willful and deliberate on the
Executive's part, which is committed in bad faith or without reasonable belief that such breach is in the best interests of the Corporation and which is not remedied in a reasonable period after
receipt of written notice from the Corporation specifying such breach. Termination of employment pursuant to this Section 4(c) shall be made to the Executive by, and be effective upon, written
notice from the President/C.E.O. or the Board.

d.All Other Terminations by the Corporation.Notwithstanding the foregoing, the Corporation may terminate your
employment at any time. If your employment is terminated for any reason other than "for Cause", death or disability, you shall continue to receive your current Base Salary for a period of twelve
(12) months from the date of such termination. In addition, you shall be eligible to elect COBRA coverage and only pay an amount equal to the employee contribution typically paid for your type
of medical, dental and vision coverage. The Corporation will pay the remaining costs associated with COBRA coverage for the 12-month period. After twelve months, you can continue COBRA
coverage at your total cost.

5.Nondisclosure.

You
acknowledge and agree that, during your employment by the Corporation hereunder, you have or will come to have knowledge and information with respect to trade secrets or confidential
or secret

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plans,
projects, materials, business methods, operations, techniques, customers, employees, donors, products, processes, financial conditions, policies and accounts of the Corporation with respect to
the business of the Corporation ("Confidential Information.") You agree that you will not at any time divulge, furnish or make accessible to anyone (other than in the regular course of your
performance of services for the benefit of the Corporation, its successors or assigns) any Confidential Information. Notwithstanding the foregoing, Confidential Information shall not include any
information which (i) is known generally to the public (other than as a result of unauthorized disclosure), (ii) was available to you on a non-confidential basis prior to its
disclosure to you by the Corporation or (iii) is required to be disclosed pursuant to the valid order of a governmental agency or a judicial court of competent jurisdiction, in which case you
shall give prompt written notice to the Corporation of such requirement so that the Corporation may take such action as it deems appropriate.

6.Non-Compete and Non-Solicitation.

As
a material inducement to the Corporation to enter into this letter, you agree that at all times during your Employment and for a period of twelve (12) months after the
termination of your Employment, you will not (i) act in a capacity similar to that in which you shall have served in the Corporation for any Competing Business or serve in a capacity in any
such Competing Business that would entail your functioning as a sales and marketing executive for a Competing Business, or (ii) in any way, directly or indirectly, compete with the business of
the Corporation, solicit, divert, or take away or attempt to solicit, divert, or take away customers of, the business of, or any of the donors of, the Corporation that dealt with the Corporation
during your Employment. Competing Business means another business engaged in the business(es) engaged in by the Corporation at any time within one year of or at the time of your termination.

You
agree that during your Employment and for a period of twelve (12) months after the termination for any reason of your Employment, you will not within the United States of
America, directly, or indirectly through any means, including a business entity in which you have an ownership interest, request or induce any other employee of the Corporation or its affiliates or
any donor to the Corporation or its affiliates to terminate their relationship with the Corporation or its affiliates and enter into a similar relationship with another business entity engaged in a
business similar to the Corporation's.

7.Executive Creation and Ideas.

a.     You
will maintain current and adequate written records on the development of, and disclose to the Corporation all Creations (as herein defined). "Creations" shall mean
all ideas, potential marketing and sales relationships, inventions, copyrightable expression, research, plans for products or services, marketing plans, reports, strategies, processes, computer
software (including, without limitation, source code), computer programs, original works of authorship, characters, know-how, trade secrets, information, data, developments, discoveries,
improvements, modifications, technology, algorithms, database schema, designs and drawings, whether or not subject to patent or copyright protection, made, conceived, expressed, developed, or actually
or constructively reduced to practice by you solely or jointly with others during your employment with the Corporation, which refer to, are suggested by, or result from any work which you may perform
during your employment, or from any information obtained from the Corporation or any affiliate of the Corporation. 'Creations,' however, shall not include the general business planning concepts,
strategies or processes, including, but not limited to, those utilized by you in any prior employment.

b.     The
Creations shall be the exclusive property of the Corporation, and you acknowledge that all of said Creations shall be considered as "work made for hire" belonging to
the Corporation. To the extent that any such Creations, under applicable law, may not be considered work made for hire by you for the Corporation, you hereby agree to assign and, upon its creation,
automatically and irrevocably assign to the Corporation, without any further consideration, all right, title and interest in and to such

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materials,
including, without limitation, any copyright, other intellectual property rights, moral rights, all contract and licensing rights, and all claims and causes of action of any kind with
respect to such materials. The Corporation shall have the exclusive right to use the Creations, whether original or derivative, for all purposes without additional compensation to you. At the
Corporation's expense, you will reasonably assist the Corporation in every reasonably proper way to perfect the Corporation's rights in the Creations and to protect the Creations throughout the world,
including, without limitation, executing in favor of the Corporation or any designee(s) of the Corporation patent, copyright, and other applications and assignments relating to the Creations.

c.     Should
the Corporation be unable to secure your signature on any document necessary to apply for, prosecute, obtain, or enforce any patent, copyright, or other right or
protection relating to any Creation, whether due to your mental or physical incapacity or any other cause, you hereby irrevocably designate and appoint the Corporation and each of its duly authorized
officers and agents as your agent and attorney in fact, to act for and in your behalf and stead and to execute and file any such document, and to do all other lawfully permitted acts to further the
prosecution, issuance, and enforcement of patents, copyrights, or other rights or protections with the same force and effect as if executed and delivered by you.

d.     Because
of the difficulty of establishing when any idea, process or invention is first conceived or developed by you, or whether it results from access to Confidential
Information or the Corporation's equipment, supplies, facilities, and data (collectively, "Corporation Information"), you agree that any idea, invention, research, plan for products or services,
marketing plan, computer software (including, without limitation, source code), computer program, original work of authorship, character, know-how, trade secret, information, data,
developments, discoveries, technology, algorithm, design, patent or copyright, or any improvement, rights, or claims (an "Idea") related to the foregoing, which refer to, are suggested by, or result
from any work which you performed during your employment with the Corporation or from any Corporation Information, shall be presumed to be a Creation if it is conceived, developed, used, sold,
exploited or reduced to practice by you or with your aid within one (1) year after termination of employment. This paragraph, however, shall not apply to anything that is specifically excepted
from the definition of "Creations" in the last sentence of Section 7(a). You can rebut the above presumption if you prove that the idea, process or invention (a) was first conceived or
developed after termination of employment, (b) was conceived or developed entirely on your own time without using any Corporation Information, and (c) did not result from any work
performed by you for the Corporation.

8.Injunctive Relief/Survival.

You
agree that any breach of Section 5, 6 or 7 will cause irreparable damage to the Corporation and that, in the event of such breach, the Corporation will have, in addition to
any and all remedies of law, including rights which the Corporation may have to damages, the right to equitable relief including, as appropriate, all injunctive relief or specific performance or other
equitable relief. You understand and agree that the rights and obligations set forth in Sections 5 through 10 of this Agreement shall survive the termination or expiration of this Agreement.

9.Corporation Resources.

You
may not use any of the Corporation's equipment for personal purposes without written permission from the Corporation. You may not give access to the Corporation's offices or files to
any person not in the employ of the Corporation without written permission of the Corporation.

10.Miscellaneous.

a.General.This Agreement supersedes and replaces any existing agreement between the Executive and the
Corporation relating generally to the same subject matter, and may be modified only in a writing signed by the parties hereto. Failure to enforce any provision of the Agreement shall not

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constitute
a waiver of any term herein. The Executive agrees that he will not assign, transfer, or otherwise dispose of, whether voluntarily or involuntarily, or by operation of law, any rights or
obligations under this Agreement. Any purported assignment, transfer, or disposition shall be null and void. Nothing in this Agreement shall prevent the consolidation of the Corporation with, or its
merger into, any other corporation, or the sale by the Corporation of all or substantially all of its properties or assets, or the assignment by the Corporation of this Agreement and the performance
of its obligations hereunder. Subject to the foregoing, this Agreement shall be binding upon and shall inure to the benefit of the parties and their respective heirs, legal representatives,
successors, and permitted assigns, and shall not benefit any person or entity other than those enumerated above.

b.Governing Law.This letter is to be governed by and interpreted in accordance with the laws of the State of
Georgia applicable to agreements made and to be performed within that State except as provided herein.

c.No Attorney Provided.The Corporation advises you that it is not providing legal advice in connection with
your acceptance and execution hereof. You acknowledge (a) that you have consulted with or have had the opportunity to consult with independent counsel of your own choice concerning this
Agreement and have been advised to do so by the Corporation, and (b) that you have read and understand the Agreement, are fully aware of its legal effect, and have entered into it freely based
on your own judgment.

d.Affiliate.References to the "Corporation" hereunder shall include "affiliates" thereof, as such term is
defined in Rule 405 under the Securities Act of 1933, as amended. The Corporation shall have the right to designate as your employer hereunder any affiliate of which the Executive shall have
significant operating or managerial responsibility or any other affiliate to which the Executive agrees.

e.Severability.If any provision of this letter shall be determined to be invalid, illegal or unenforceable in
whole or in part, all other provisions hereof shall remain in full force and effect to the fullest extent permitted by law.

f.Expiration.This Offer will expire at 5:00 p.m. Eastern Daylight Savings Time on April 20, 2004
unless you execute this letter and return it to Robert P. Collins, Vice President, Human Resources prior to that time. Please fax the signature page only to 678-728-2138 and
return one copy of the entire agreement using the enclosed FedEx envelope. The other copy of the agreement is for your records.

g.Contingencies.This Offer is contingent upon satisfactory drug screen results, pre-employment
background check and references.

Please
indicate your acceptance of this Offer by signing in the space provided below.

| |  | Sincerely,                                          
| |  | ----------------------------------------------------
| |  | SEROLOGICALS CORPORATION                            
| |  | By:                                                 
| |  | ACKNOWLEDGED AND AGREED this 19th day of April 2004.
| |  | /s/DENNIS W. HARRIS, PH.D.Dennis W. Harris, Ph.D    

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