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                                                                    EXHIBIT 10.3

                                  NOVAVAX, INC.

                         AMENDMENT TO STOCK OPTION PLAN

       Pursuant to the resolution of the Board of Directors of Novavax, Inc.
adopted on March 7, 2000, and approved by the stockholders of Novavax, Inc. on
May 9, 2000, Section 4 of the Novavax, Inc. 1995 Stock Option Plan is hereby
amended by deleting the number 4,400,000" and inserting in its place the number
"6,000,000" so that the first sentence of Section 4 now reads in its entirety as
follows:

       "Subject to adjustment as provided in Section 15 below, the maximum
       number of shares of Common Stock which may be issued and sold under the
       Plan is 6,000,000 shares."

                                           NOVAVAX, INC.

                                           /s/ David A. White
                                           -------------------------------------
                                           David A. White, Secretary<PAGE>   1

                                                                     EXHIBIT 4.1

Number                                                                Shares

YOU
Common Stock                 [YOUCENTRIC, INC. LOGO]                Common Stock

                                YOUcentric, INC.

           INCORPORATED UNDER THE LAWS OF THE STATE OF NORTH CAROLINA

                                                               CUSIP 98741P 10 2

-------------------------------------------------------
This Certifies that
                                                               SEE REVERSE FOR
                                                             CERTAIN DEFINITIONS
is the owner of
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fully paid and non-assessable shares of common stock, no par value, of
YOUCENTRIC, INC., transferable on the books of the Corporation in person or by
duly authorized Attorney upon surrender of this Certificate properly endorsed.
This Certificate is not valid until countersigned and registered by the Transfer
Agent and Registrar.

         Witness the facsimile seal of the Corporation and the facsimile
signatures of its duly authorized officers.

         Dated:

          /s/ Robert E. Kear    [CORPORATE SEAL]      /s/ Donald A. DeLoach
               Secretary                           President and Chief Executive
                                                              Officer

COUNTERSIGNED AND REGISTERED:

First Union National Bank
      (Charlotte, NC)
By:  Transfer Agent and Registrar

                  Authorized Signature

<PAGE>   2

                                YOUCENTRIC, INC.

         The Corporation will furnish in writing and without charge to each
shareholder who so requests a statement of the designations, relative rights,
preferences and limitations applicable to all classes of shares the Corporation
is authorized to issue and the variations in rights, preferences and limitations
determined for each series within a class (and the authority of the
Corporation's Board of Directors to determine variations for future series).

         The following abbreviations, when used in the inscription on the face
of this certificate, shall be construed as though they were written out in full
according to applicable laws or regulations:

TEN COM - as tenants in common         UNIF GIFT MIN ACT-______ Custodian_______
TEN ENT - as tenants by the entireties                   (Cust)          (Minor)
JT TEN  - as joint tenants with right of           under Uniform Gifts to Minors
        survivorship and not as tenants            Act _______________
        in common                                          (State)

     Additional abbreviations may also be used though not in the above list.

  For value received, ___________________ hereby sell, assign and transfer unto

    PLEASE INSERT SOCIAL SECURITY OR OTHER
        IDENTIFYING NUMBER OF ASSIGNEE
-----------------------------------------------

-----------------------------------------------

________________________________________________________________________________
  (PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE)
________________________________________________________________________________

________________________________________________________________________________

_________________________________________________________________________ shares
of the capital stock represented by the within Certificate, and do hereby
irrevocably constitute and appoint
_________________________________________________________ Attorney to transfer
the said stock on the books of the within named Corporation with full power of
substitution in the premises.

Dated:  _______________________

                                    ____________________________________________

                                    ____________________________________________
                           NOTICE:  THE SIGNATURE(S) TO THIS ASSIGNMENT MUST
                                    CORRESPOND WITH THE NAME AS WRITTEN UPON THE
                                    FACE OF THE CERTIFICATE IN EVERY PARTICULAR,
                                    WITHOUT ALTERATION OR ENLARGEMENT, OR ANY
                                    CHANGE WHATEVER.

          SIGNATURE(S) GUARANTEED:  ____________________________________________
                                    THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN
                                    ELIGIBLE GUARANTOR INSTITUTION (BANKS,
                                    STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS
                                    AND CREDIT UNIONS WITH MEMBERSHIP IN AN
                                    APPROVED SIGNATURE GUARANTEE MEDALLION
                                    PROGRAM), PURSUANT TO S.E.C. RULE 17Ad-15.

          KEEP THIS CERTIFICATE IN A SAFE PLACE. IF IT IS LOST, STOLEN,
          MUTILATED OR DESTROYED, THE CORPORATION WILL REQUIRE A BOND OF
          INDEMNITY AS A CONDITION TO THE ISSUANCE OF A REPLACEMENT
          CERTIFICATE.<PAGE>   1

                                                                   EXHIBIT 10.27

                         BONUS COMPENSATION ARRANGEMENT

         THIS BONUS COMPENSATION ARRANGEMENT (the "Arrangement") between
YOUcentric, Inc. (the "Corporation") and Donald A. DeLoach (the "Executive")
effective April 1, 2000.

1.       GENERAL

         Prior to the beginning of each fiscal quarter, or as soon as
administratively practical thereafter, the Compensation Committee of the Board
of Directors of the Corporation (the "Committee") shall establish quarterly
Corporation financial goals ("Corporate Goals") the achievement of which shall
determine the Executive's bonus entitlement hereunder. Prior to the beginning of
each fiscal quarter, or as soon as administratively practical thereafter, the
Committee shall provide the Executive with a schedule which sets forth the
criteria for receiving a bonus hereunder, as well as the amount of the bonus
which the Executive shall be eligible to receive, for such fiscal quarter (the
"Schedule"). The Schedule shall be substantially in the form and manner of
Exhibit A attached hereto. The Committee and the Executive shall be entitled to
modify any Corporate Goal during a fiscal quarter; all such modifications shall
be documented by amending the Schedule for such fiscal quarter, which amended
Schedule shall be signed by the Executive and on behalf of the Committee.

         The Committee shall make the determination of whether the Corporation
has achieved any or all of the Corporate Goals for a fiscal quarter in its sole
discretion based on the Corporation's financial statements for such fiscal
quarter. The Committee shall otherwise administer the Arrangement in its sole
discretion.

2.       PAYMENT OF BONUS

         (a) Any bonus payable to the Executive for a fiscal quarter pursuant to
the Arrangement shall be paid to the Executive in a lump sum in cash as soon as
administratively practical following the close of such fiscal quarter.

         (b) Except as otherwise determined by the Committee in its sole
discretion, notwithstanding any other provision of the Arrangement, the
Executive shall become entitled to a bonus under this Arrangement for a fiscal
quarter only if he is an employee of the Corporation on the last day of such
fiscal quarter.

3.       SUCCESSOR TO THE COMPANY

         This Arrangement shall be binding upon 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 Corporation, and the
Corporation shall require any such successor to expressly assume and agree to
perform this Arrangement. As used in this Arrangement, "Corporation" shall mean
the Corporation as defined herein and any successor to its business and/or
assets.

4.       NO RIGHTS TO CONTINUED EMPLOYMENT

         This Arrangement shall not be construed to give the Executive a right
of continued employment with, or the right to be retained in the employ of, the
Corporation.

                                      -1-

<PAGE>   2

5.       TAXES

         To the extent required by law, the Corporation shall withhold any
federal, state or local taxes from payments made under this Arrangement,
including social security (FICA) taxes.

6.       AMENDMENT AND TERMINATION

         The Corporation and the Executive shall be entitled to amend or
terminate this Arrangement at any time by writing signed by the parties.

7.       OTHER BONUSES

         The establishment and maintenance of the Arrangement shall in no way
affect the Corporation's ability to award additional bonuses or stock options to
the Executive.

8.       ACKNOWLEDGEMENT

         The offer letter between the Corporation and the Executive dated May
20, 1999 (the "Offer Letter") provides for a bonus arrangement between the
Corporation and the Executive. By his signature hereunder, the Executive agrees
and acknowledges that this Arrangement sets forth in its entirety the bonus
arrangement between the Corporation and the Executive contemplated by the Offer
Letter and that this Arrangement supersedes and replaces in their entirety all
provisions of the Offer Letter with respect to the Corporation's commitment to
provide the Executive with bonus compensation.

9.       MISCELLANEOUS

         (a) If any provision of this Arrangement shall be determined to be void
by any court of competent jurisdiction, then such determination shall not affect
any other provision of this Arrangement, all of which shall remain in full force
and effect.

         (b) This Arrangement shall be construed and enforced in accordance with
the laws of the State of North Carolina.

         IN WITNESS WHEREOF, the Corporation has executed this Arrangement under
seal through its duly authorized officers and the Executive has executed this
Arrangement under seal as of April 1, 2000.

                                         YOUCENTRIC, INC.

                                         By:    /s/ Thomas M. Fedell
                                                --------------------------------
                                         Name:  Thomas M. Fedell
                                         Title: Chairman

                                         DONALD A. DELOACH

                                         /s/ Donald A. DeLoach
                                         ---------------------------------------

                                      -2-

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                                    EXHIBIT A
                         BONUS COMPENSATION ARRANGEMENT
                           SCHEDULE OF CORPORATE GOALS
                               AND AMOUNT OF BONUS

Fiscal Quarter:
               -------------------------------------

1.       DESCRIPTION OF CORPORATE GOALS

         a.       Revenue

                  The total amount of revenues reported by the Company during
                  the fiscal quarter.

         b.       Bookings

                  The total value of license and first year maintenance
                  contracts booked during the fiscal quarter.

         c.       Headcount

                  The total number of Company employees as of the end of the
                  fiscal quarter targeted in the headcount plan, subject to
                  revision by the executive team on an as appropriate basis.

         d.       Expenses

                  The total amount of cash operating expenses reported by the
                  Company during the fiscal quarter.

2.       POTENTIAL BONUS

         a.       Amount of Maximum Total Potential Bonus:    $ 75,000

         b.       Percentage of Maximum Total Potential Bonus Tied to
                  Achievement of Specific Corporate Goal(s):

                  i.       Revenue Goal:             $ 22,500

                  ii.      Bookings Goal:            $ 22,500

                  iii.     Headcount Goal:           $ 15,000

                  iv.      Expenses Goal:            $ 15,000

3.       BONUS CALCULATION

         The quarterly bonus payable hereunder is calculated as follows:

         a.       Revenue Goal Bonus: $22,500 x (actual revenue reported /
                  Committee established Revenue Goal) up to 100%

                                      -3-

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         b.       Bookings Goal Bonus: $22,500 x (actual license and first year
                  maintenance contracts booked / Committee established Bookings
                  Goal) up to 100%, but $0 if ratio is below 70%

         c.       Headcount Goal Bonus: $15,000 x (actual number of Company
                  employees / Committee established Headcount Goal) up to 100%

         d.       Expenses Goal Bonus: $15,000 x (Committee established Expenses
                  Goal / actual cash operating expenses reported ) up to 100%

                                      -4-

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