CHIRON CORP
EXHIBIT 10.512
<DOCUMENT>
<TYPE>EX-10.512
<SEQUENCE>3
<FILENAME>a2044752zex-10_512.htm
<DESCRIPTION>EXHIBIT 10.512
<TEXT>

<HTML>
<HEAD>
<TITLE> Prepared by MERRILL CORPORATION
</TITLE>
</HEAD>
<BODY BGCOLOR="#FFFFFF" LINK=BLUE  VLINK=PURPLE>
<BR>
<FONT SIZE=3 ><A HREF="#01SFO1577_3">QuickLinks</A></FONT>
<font size=3> -- Click here to rapidly navigate through this document</font>
<!-- TOC_END -->
<P ALIGN="CENTER"><FONT SIZE=2><A
NAME="ke1578_executive_change-in-control_severance_plan"> </A>
<A NAME="toc_ke1578_1"> </A>
<BR></FONT><FONT SIZE=2><B>Executive Change-in-Control<BR>  Severance Plan    <BR>  </B></FONT></P>

<P ALIGN="CENTER"><FONT SIZE=2>Chiron
Corporation<BR>
January&nbsp;2001 </FONT></P>

<P ALIGN="RIGHT"><FONT SIZE=2><B>TIER II  </B></FONT></P>

<HR NOSHADE>
<!-- ZEQ.=1,SEQ=1,EFW="2044752",CP="CHIRON CORPORATION",DN="3",CHK=269122,FOLIO='blank',FILE='DISK012:[01SFO8.01SFO1578]KE1578A.;10',USER='CSTCLAI',CD=';9-MAY-2001;11:42' -->
<P ALIGN="CENTER"><FONT SIZE=2><A
NAME="ke1578_contents"> </A>
<A NAME="toc_ke1578_2"> </A>
<BR></FONT><FONT SIZE=2><B>CONTENTS    <BR>  </B></FONT></P>

<!-- User-specified TAGGED TABLE -->
<TABLE WIDTH="79%" BORDER=0 CELLSPACING=0 CELLPADDING=0>
<TR BGCOLOR="#CCEEFF" VALIGN="TOP">
<TD WIDTH="12%"><FONT SIZE=2>Article&nbsp;1.</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="81%"><FONT SIZE=2>Establishment, Term, and Purpose</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="RIGHT"><FONT SIZE=2>1</FONT></TD>
</TR>
<TR BGCOLOR="White" VALIGN="TOP">
<TD WIDTH="12%"><FONT SIZE=2>Article&nbsp;2.</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="81%"><FONT SIZE=2>Definitions</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="RIGHT"><FONT SIZE=2>1</FONT></TD>
</TR>
<TR BGCOLOR="#CCEEFF" VALIGN="TOP">
<TD WIDTH="12%"><FONT SIZE=2>Article&nbsp;3.</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="81%"><FONT SIZE=2>Participation</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="RIGHT"><FONT SIZE=2>5</FONT></TD>
</TR>
<TR BGCOLOR="White" VALIGN="TOP">
<TD WIDTH="12%"><FONT SIZE=2>Article&nbsp;4.</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="81%"><FONT SIZE=2>Severance Benefits</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="RIGHT"><FONT SIZE=2>5</FONT></TD>
</TR>
<TR BGCOLOR="#CCEEFF" VALIGN="TOP">
<TD WIDTH="12%"><FONT SIZE=2>Article&nbsp;5.</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="81%"><FONT SIZE=2>Form&nbsp;and Timing of Severance Benefits</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="RIGHT"><FONT SIZE=2>7</FONT></TD>
</TR>
<TR BGCOLOR="White" VALIGN="TOP">
<TD WIDTH="12%"><FONT SIZE=2>Article&nbsp;6.</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="81%"><FONT SIZE=2>Excise Tax Equalization Payment</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="RIGHT"><FONT SIZE=2>7</FONT></TD>
</TR>
<TR BGCOLOR="#CCEEFF" VALIGN="TOP">
<TD WIDTH="12%"><FONT SIZE=2>Article&nbsp;7.</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="81%"><FONT SIZE=2>The Company's Payment Obligation</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="RIGHT"><FONT SIZE=2>8</FONT></TD>
</TR>
<TR BGCOLOR="White" VALIGN="TOP">
<TD WIDTH="12%"><FONT SIZE=2>Article&nbsp;8.</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="81%"><FONT SIZE=2>Arbitration</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="RIGHT"><FONT SIZE=2>9</FONT></TD>
</TR>
<TR BGCOLOR="#CCEEFF" VALIGN="TOP">
<TD WIDTH="12%"><FONT SIZE=2>Article&nbsp;9.</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="81%"><FONT SIZE=2>Successors and Assignment</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="RIGHT"><FONT SIZE=2>9</FONT></TD>
</TR>
<TR BGCOLOR="White" VALIGN="TOP">
<TD WIDTH="12%"><FONT SIZE=2>Article&nbsp;10.</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="81%"><FONT SIZE=2>Miscellaneous</FONT></TD>
<TD WIDTH="3%"><FONT SIZE=2>&nbsp;</FONT></TD>
<TD WIDTH="2%" ALIGN="RIGHT"><FONT SIZE=2>9</FONT></TD>
</TR>
</TABLE>
<!-- end of user-specified TAGGED TABLE -->

<HR NOSHADE>
<!-- ZEQ.=2,SEQ=2,EFW="2044752",CP="CHIRON CORPORATION",DN="3",CHK=753405,FOLIO='blank',FILE='DISK012:[01SFO8.01SFO1578]KE1578A.;10',USER='CSTCLAI',CD=';9-MAY-2001;11:42' -->
<P ALIGN="CENTER"><FONT SIZE=2><A
NAME="ke1578_chiron_corporation_executive_c__chi02402"> </A>
<A NAME="toc_ke1578_3"> </A>
<BR></FONT><FONT SIZE=2><B>Chiron Corporation<BR>  Executive Change-in-Control Severance Plan    <BR>  </B></FONT></P>


<P><FONT SIZE=2><B>Article&nbsp;1. Establishment, Term, and Purpose  </B></FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;1.1&nbsp;&nbsp;Establishment of the Plan.</B></FONT><FONT SIZE=2>&nbsp;&nbsp;Chiron Corporation (hereinafter referred to as the "Company") hereby
establishes a change-in-control severance plan to be known as the "Chiron Corporation Executive Change-in-Control Severance Plan" (the "Plan"). </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;1.2&nbsp;&nbsp;Term of the Plan.</B></FONT><FONT SIZE=2>&nbsp;&nbsp;This Plan will commence upon December&nbsp;9, 2000 (the "Effective Date") and
shall continue in effect for two (2)&nbsp;full calendar years. However, at the end of such two (2)&nbsp;year period and, if extended, at the end of each additional year thereafter, the term of
this Plan shall be extended automatically for one (1)&nbsp;additional year, unless the Committee delivers written notice six (6)&nbsp;months prior to the end of such term, or extended term, to
each Participant, that the Plan will not be extended. However, in the event a Change in Control occurs during the original or any extended term, this Plan will remain in effect, solely with respect to
obligations relating to such Change in Control, for the longer of: (i)&nbsp;two (2)&nbsp;years beyond the month in which such Change in Control occurred; or (ii) until all obligations of the
Company hereunder have been fulfilled, and until all benefits required hereunder have been paid to Participants. </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;1.3.&nbsp;&nbsp;Purpose of the Plan.</B></FONT><FONT SIZE=2>&nbsp;&nbsp;The purpose of the Plan is to provide certain key employees of the Company
with greater incentive to remain in the employ of the Company, particularly in the event of any possible change or threatened change in control of the Company. </FONT></P>

<P><FONT SIZE=2><B>Article&nbsp;2. Definitions  </B></FONT></P>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;Whenever used in this Plan, the following terms shall have the meanings set forth below and, when the meaning is intended, the initial letter of the word is
capitalized. </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;2.1&nbsp;&nbsp;"Base Salary"</B></FONT><FONT SIZE=2>&nbsp;&nbsp;as of any date means the annual rate of a Participant's base salary, excluding
amounts received under incentive or other bonus plans, computed before any deferrals or pre-or post-tax payroll deductions. </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;2.2&nbsp;&nbsp;"Beneficial Owner"</B></FONT><FONT SIZE=2>&nbsp;&nbsp;shall have the meaning ascribed to such term in Rule&nbsp;13d-3 of the General
Rules&nbsp;and Regulations under the Exchange Act. </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;2.3&nbsp;&nbsp;"Beneficiary"</B></FONT><FONT SIZE=2>&nbsp;&nbsp;means the persons or entities designated or deemed designated by the Participant
pursuant to Section&nbsp;9.2 herein. </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;2.4&nbsp;&nbsp;"Board"</B></FONT><FONT SIZE=2>&nbsp;&nbsp;means the Board of Directors of the Company. </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;2.5&nbsp;&nbsp;"Cause"</B></FONT><FONT SIZE=2>&nbsp;&nbsp;means: </FONT></P>

<UL>
<DL compact>
<DT><FONT SIZE=2>(a)</FONT></DT><DD><FONT SIZE=2>The
Participant's willful and continued failure to substantially perform his/her duties with the Company (other than any such failure resulting from Disability or occurring after
issuance by the Participant of a Notice of Termination for Good Reason), after a written demand for substantial performance is delivered to the Participant that specifically identifies the manner in
which the Company believes that the Participant has willfully failed to substantially perform his/her duties, and after the Participant has failed to resume substantial performance of his/her duties
on a continuous basis within thirty (30) calendar days of receiving such demand;
<BR><BR></FONT></DD><DT><FONT SIZE=2>(b)</FONT></DT><DD><FONT SIZE=2>The
Participant's material act of dishonesty, fraud or embezzlement against the Company, unauthorized disclosure of confidential information or trade secrets of the Company or an
affiliate (whether or not in violation of any confidentiality agreement) or other willful conduct (other than conduct covered under (a)&nbsp;above) that is demonstrably injurious to the Company,
monetarily or otherwise; or
<BR><BR></FONT></DD><DT><FONT SIZE=2>(c)</FONT></DT><DD><FONT SIZE=2>The
Participant's having been convicted of a felony. </FONT></DD></DL>
</UL>
<HR NOSHADE>
<!-- ZEQ.=3,SEQ=3,EFW="2044752",CP="CHIRON CORPORATION",DN="3",CHK=224615,FOLIO='blank',FILE='DISK012:[01SFO8.01SFO1578]KE1578A.;10',USER='CSTCLAI',CD=';9-MAY-2001;11:42' -->
<A NAME="page_ke1578_1_2"> </A>
<UL>
<UL>
</UL>
</UL>
<UL>

<P><FONT SIZE=2>For
purposes of this subparagraph, no act, or failure to act, on the Participant's part shall be deemed "willful" unless done, or omitted to be done, by the Participant not in good faith and without
reasonable belief that the action or omission was in the best interests of the Company. </FONT></P>

</UL>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;2.6&nbsp;&nbsp;"Change in Control"</B></FONT><FONT SIZE=2>&nbsp;&nbsp;of the Company shall be deemed to have occurred as of the first day during the
term of this Plan that any one or more of the following conditions is satisfied and regulatory approval has been granted if necessary: </FONT></P>

<UL>
<DL compact>
<DT><FONT SIZE=2>(a)</FONT></DT><DD><FONT SIZE=2>The
"beneficial ownership" (as defined in Rule&nbsp;13d-3 under the Exchange Act) of securities representing more than thirty percent (30%) of the combined voting power of all
securities of the Company is acquired, directly or indirectly, by a Person (other than the Company, any trustee or other fiduciary holding securities under an employee benefit plan of the Company or
an affiliate thereof, or any corporation owned, directly or indirectly, by the stockholders of the Company in substantially the same proportions as their ownership of stock of the Company); or
<BR><BR></FONT></DD><DT><FONT SIZE=2>(b)</FONT></DT><DD><FONT SIZE=2>During
any period of two (2)&nbsp;consecutive years, individuals who at the beginning of such period constitute the Board of Directors and any new director (other than a director
designated by a person who has entered into an agreement with the Company to effect a transaction described in paragraph (a)&nbsp;or (b)&nbsp;of this section) whose election by the Board of
Directors or nomination for election by the Company's stockholders was approved by a vote of at least two-thirds of the directors then still in office who either were directors at the beginning of the
period or whose election or nomination for election was previously so approved, cease for any reason to constitute a majority thereof; or
<BR><BR></FONT></DD><DT><FONT SIZE=2>(c)</FONT></DT><DD><FONT SIZE=2>The
stockholders of the Company approve a definitive agreement to sell or otherwise dispose of all or substantially all of its assets, or adopt a plan for liquidation, provided that
such sale or liquidation has not been abandoned. </FONT></DD></DL>
</UL>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;Notwithstanding
anything else contained herein to the contrary, in no event shall a Change in Control be deemed to have occurred by reason of a purchase, or series of purchases of
Company stock by Novartis or its successor such that the acquiring entity remains subject to the terms of that certain Governance Agreement dated as of January&nbsp;5, 1995, as amended through
December&nbsp;9, 2000, provided the acquiring entity's Company stock holdings, direct or indirect, in the aggregate, represent seventy-nine percent (79%) or less of the combined voting power of all
outstanding Company securities. </FONT></P>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;However,
in no event shall a Change in Control be deemed to have occurred, with respect to the Participant, if the Participant is part of a purchasing group that consummates the
Change-in-Control transaction. The Participant shall be deemed "part of a purchasing group" for purposes of the preceding sentence if the Participant is an equity participant in the purchasing company
or group (except for: (i)&nbsp;passive ownership of less than three percent (3%) of the stock or other equity of the purchasing company; or (ii)&nbsp;ownership of equity participation in the
purchasing company or group which is otherwise not significant, as determined prior to the Change in Control by a majority of the nonemployee continuing Directors). </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;2.7&nbsp;&nbsp;"Code"</B></FONT><FONT SIZE=2>&nbsp;&nbsp;means the United States Internal Revenue Code of 1986, as amended, and any successors
thereto. </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;2.8&nbsp;&nbsp;"Committee"</B></FONT><FONT SIZE=2>&nbsp;&nbsp;means the Compensation Committee of the Board or any other committee appointed by the
Board to perform the functions of the Compensation Committee for purposes of administering this Plan. </FONT></P>


<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;2.9&nbsp;&nbsp;"Company"</B></FONT><FONT SIZE=2>&nbsp;&nbsp;means Chiron Corporation, a Delaware corporation, or any successor thereto as provided in
Article&nbsp;9 herein. </FONT></P>

<P ALIGN="CENTER"><FONT SIZE=2>2</FONT></P>

<HR NOSHADE>
<!-- ZEQ.=4,SEQ=4,EFW="2044752",CP="CHIRON CORPORATION",DN="3",CHK=553820,FOLIO='2',FILE='DISK012:[01SFO8.01SFO1578]KE1578A.;10',USER='CSTCLAI',CD=';9-MAY-2001;11:42' -->
<A NAME="page_ke1578_1_3"> </A>
<BR>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;2.10&nbsp;&nbsp;"Disability"</B></FONT><FONT SIZE=2>&nbsp;&nbsp;means complete and permanent inability by reason of illness or accident to perform
the duties of the occupation at which the Participant was employed when such disability commenced, where inability is expected to last one year or longer. </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;2.11&nbsp;&nbsp;"Effective Date"</B></FONT><FONT SIZE=2>&nbsp;&nbsp;means the date of this Plan set forth above. </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;2.12&nbsp;&nbsp;"Effective Date of Termination"</B></FONT><FONT SIZE=2>&nbsp;&nbsp;means the date on which a Qualifying Termination occurs which
triggers the payment of Severance Benefits hereunder. </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;2.13&nbsp;&nbsp;"Exchange Act"</B></FONT><FONT SIZE=2>&nbsp;&nbsp;means the United States Securities Exchange Act of 1934, as amended. </FONT></P>


<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;2.14&nbsp;&nbsp;"Good Reason"</B></FONT><FONT SIZE=2>&nbsp;&nbsp;shall mean, without the Participant's express written consent, the occurrence of any
one or more of the following: </FONT></P>

<UL>
<DL compact>
<DT><FONT SIZE=2>(a)</FONT></DT><DD><FONT SIZE=2>The
assignment of the Participant to duties materially inconsistent with the Participant's authorities, duties, responsibilities as an employee of the Company, or a material
reduction in the nature or status of the Participant's authorities, duties, or responsibilities than those in effect immediately preceding the Change in Control;
<BR><BR></FONT></DD><DT><FONT SIZE=2>(b)</FONT></DT><DD><FONT SIZE=2>The
Company's requiring the Participant to be based at a location which is at least fifty (50) miles further from the Participant's current primary residence than is such residence
from the Company's current headquarters, except for required travel on the Company's business to an extent substantially consistent with the Participant's business obligations as of the Effective
Date;
<BR><BR></FONT></DD><DT><FONT SIZE=2>(c)</FONT></DT><DD><FONT SIZE=2>A
material reduction in the Participant's Base Salary or bonus opportunity as in effect on the Effective Date or as the same shall be increased from time to time;
<BR><BR></FONT></DD><DT><FONT SIZE=2>(d)</FONT></DT><DD><FONT SIZE=2>A
material reduction in the Participant's level of participation in any of the Company's short- and/or long-term incentive compensation plans, or employee benefit or retirement
plans, policies, practices, or arrangements in which the Participant participates immediately preceding the Change in Control; provided, however, that reductions in the levels of participation in any
such plans shall not be deemed to be "Good Reason" if the Participant's reduced level of participation in each such program remains substantially consistent with the average level of participation of
other executives who have positions commensurate with the Participant's position. </FONT></DD></DL>
</UL>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;For
purposes of this Plan, long-term incentive plans shall mean the Chiron Executive Long-Term Incentive Plan, the 1991 Stock Option Plan, and any other similar plans instituted by
the Company; </FONT></P>

<UL>
<DL compact>
<DT><FONT SIZE=2>(e)</FONT></DT><DD><FONT SIZE=2>The
failure of the Company to obtain a satisfactory agreement from any successor to the Company to assume and agree to perform this Agreement, as contemplated in Article&nbsp;10
herein; or
<BR><BR></FONT></DD><DT><FONT SIZE=2>(f)</FONT></DT><DD><FONT SIZE=2>Any
termination of Participant's employment by the Company that is not effected pursuant to a Notice of Termination. </FONT></DD></DL>
</UL>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;The
existence of Good Reason shall not be affected by the Participant's temporary incapacity due to physical or mental illness not constituting a Disability. However, the occurrence
of an event set forth in (a)&nbsp;through(f) above shall not constitute Good Reason if the Company has cured such event within fifteen (15) days of receipt of written notice from the Participant
that such event has occurred and constitutes Good Reason. </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;2.15&nbsp;&nbsp;"Notice of Termination"</B></FONT><FONT SIZE=2>&nbsp;&nbsp;shall mean a written notice which shall indicate the specific termination
provision in this Plan relied upon, and shall set forth in reasonable detail the facts and circumstances claimed to provide a basis for termination of the Participant's employment under the provision
so indicated. </FONT></P>

<P ALIGN="CENTER"><FONT SIZE=2>3</FONT></P>

<HR NOSHADE>
<!-- ZEQ.=5,SEQ=5,EFW="2044752",CP="CHIRON CORPORATION",DN="3",CHK=563533,FOLIO='3',FILE='DISK012:[01SFO8.01SFO1578]KE1578A.;10',USER='CSTCLAI',CD=';9-MAY-2001;11:42' -->
<A NAME="page_ke1578_1_4"> </A>
<BR>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;2.16&nbsp;&nbsp;"Participant"</B></FONT><FONT SIZE=2>&nbsp;&nbsp;means an employee of the Company who fulfills the eligibility and participation
requirements, as provided in Article&nbsp;3 herein. </FONT></P>


<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;2.16&nbsp;&nbsp;"Person"</B></FONT><FONT SIZE=2>&nbsp;&nbsp;shall have the meaning ascribed to such term in Section&nbsp;3(a)(9)&nbsp;of the
Exchange Act and used in Sections 13(d)&nbsp;and 14(d) thereof, including a "group" as provided in Section&nbsp;13(d). </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;2.17&nbsp;&nbsp;"Qualifying Termination"</B></FONT><FONT SIZE=2>&nbsp;&nbsp;means any of the events described in Section&nbsp;4.2 herein. </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;2.18&nbsp;&nbsp;"Severance Benefits"</B></FONT><FONT SIZE=2>&nbsp;&nbsp;means the payment of severance compensation as provided in Section&nbsp;4.3
herein. </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;2.19&nbsp;&nbsp;"Target Bonus"</B></FONT><FONT SIZE=2>&nbsp;&nbsp;shall mean the target bonus amount established under the Company's annual incentive
plan. </FONT></P>

<P><FONT SIZE=2><B>Article&nbsp;3. Participation  </B></FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;3.1&nbsp;&nbsp;Eligible Employees.</B></FONT><FONT SIZE=2>&nbsp;&nbsp;Individuals eligible to participate in the Plan shall include all key employees
of the Company, as determined by the Committee in its sole discretion. </FONT></P>


<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;3.2&nbsp;&nbsp;Participation.</B></FONT><FONT SIZE=2>&nbsp;&nbsp;Subject to the terms of the Plan, the Committee may, from time to time, select from
all eligible employees those who shall participate in the Plan. </FONT></P>

<P><FONT SIZE=2><B>Article&nbsp;4. Severance Benefits  </B></FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;4.1&nbsp;&nbsp;Right to Severance Benefits.</B></FONT><FONT SIZE=2>&nbsp;&nbsp;A Participant shall be entitled to receive from the Company Severance
Benefits, as described in Section&nbsp;4.3 herein, if (i)&nbsp;there has been a Change in Control of the Company, (ii)&nbsp;within twenty-four (24) calendar months following the Change in
Control, a Qualifying Termination of the Participant has occurred, and (iii)&nbsp;Participant has executed a Release, as described in Section&nbsp;4.8 herein. The benefits provided under this Plan
shall be reduced to the extent similar benefits are provided under the Chiron Corporation Executive Officer Severance Plan or any other severance protection arrangements provided by the Company either
as a plan or in the form of individual agreement or contract. </FONT></P>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;The
Participant shall not be entitled to receive Severance Benefits if he/she is terminated for Cause, or if his/her employment with the Company ends due to death or Disability or due
to a voluntary termination of employment by the Participant without Good Reason. </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;4.2&nbsp;&nbsp;Qualifying Termination.</B></FONT><FONT SIZE=2>&nbsp;&nbsp;The term Qualifying Termination means any of the following events: </FONT></P>

<UL>
<DL compact>
<DT><FONT SIZE=2>(a)</FONT></DT><DD><FONT SIZE=2>An
involuntary termination of the Participant's employment by the Company for reasons other than Cause, death or Disability pursuant to a Notice of Termination delivered to the
Participant by the Company;
<BR><BR></FONT></DD><DT><FONT SIZE=2>(b)</FONT></DT><DD><FONT SIZE=2>A
voluntary termination by the Participant for Good Reason pursuant to a Notice of Termination delivered to the Company by the Participant; provided that, if upon receiving such
Notice of Termination, the Company requests that the Participant remain an employee for a period ending no later than six (6)&nbsp;months following the date of the Change in Control (the "Transition
Employment Period") with compensation and benefits equal to or greater than the Participant's compensation and benefits immediately before the Qualifying Termination (or, if more favorable to the
Participant, immediately before the Change in Control), the Participant will not be deemed to have a Qualifying Termination unless he or she remains employed throughout the Transition Employment
Period or Executive's employment earlier terminates due to death, Disability or involuntary termination by the Company for reason other than Cause. </FONT></DD></DL>
</UL>
<P ALIGN="CENTER"><FONT SIZE=2>4</FONT></P>

<HR NOSHADE>
<!-- ZEQ.=6,SEQ=6,EFW="2044752",CP="CHIRON CORPORATION",DN="3",CHK=432351,FOLIO='4',FILE='DISK012:[01SFO8.01SFO1578]KE1578B.;8',USER='CSTCLAI',CD=';9-MAY-2001;11:42' -->
<A NAME="page_ke1578_1_5"> </A>
<UL>
<UL>
</UL>
</UL>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;4.3&nbsp;&nbsp;Description of Severance Benefits.</B></FONT><FONT SIZE=2>&nbsp;&nbsp;In the event the Participant becomes entitled to receive
Severance Benefits, as provided in Sections 4.1 and 4.2 herein, the Company shall pay to the Participant and provide him/her with the following: </FONT></P>

<UL>
<DL compact>
<DT><FONT SIZE=2>(a)</FONT></DT><DD><FONT SIZE=2>An
amount equal to two (2)&nbsp;times the highest rate of the Participant's annualized Base Salary in effect immediately preceding the Change in Control.
<BR><BR></FONT></DD><DT><FONT SIZE=2>(b)</FONT></DT><DD><FONT SIZE=2>An
amount equal to two (2)&nbsp;times the Participant's highest target bonus established for the year immediately preceding the Change in Control.
<BR><BR></FONT></DD><DT><FONT SIZE=2>(c)</FONT></DT><DD><FONT SIZE=2>An
amount equal to the Participant's unpaid Base Salary, any unpaid bonus earned before the year in which the termination occurs, a pro rata amount of the Participant's Target Bonus
for the year in which the termination occurs, and accrued but unused paid time off in accordance with company policy through the Effective Date of Termination.
<BR><BR></FONT></DD><DT><FONT SIZE=2>(d)</FONT></DT><DD><FONT SIZE=2>A
continuation of the welfare benefits of life and accidental death and dismemberment, and disability insurance coverage for two (2)&nbsp;full years after the Effective Date of
Termination. These benefits shall be provided to the Participant at the same premium cost, and at the same coverage level,
as in effect as of the Participant's Effective Date of Termination. However, in the event the premium cost and/or level of coverage shall change for all employees of the Company, or for management
employees with respect to supplemental benefits, the cost and/or coverage level, likewise, shall change for the Participant in a corresponding manner. The Company may satisfy its obligation to provide
a continuation of health care benefits by paying that portion of the Participant's premiums required under Consolidated Omnibus Budget Reconciliation Act ("COBRA") that exceed the amount of premiums
that the Participant would have been required to pay for continuing coverage had he or she continued in employment. If the Company is not reasonably able to continue these benefits under the Company's
plans, the Company may provide similar coverage under other vehicles or may, in lieu thereof, pay the Participant an amount equal to the value of these benefits. </FONT></DD></DL>
</UL>
<UL>
<UL>

<P><FONT SIZE=2>The
continuation of these welfare benefits shall be discontinued prior to the end of the two (2)&nbsp;year period in the event the Participant has available substantially similar benefits at a
comparable cost from a subsequent employer, as determined by the Committee. </FONT></P>

</UL>
<DL compact>
<DT><FONT SIZE=2>(e)</FONT></DT><DD><FONT SIZE=2>All
long-term incentive awards will vest in accordance with the terms of the plan or program under which they were granted. </FONT></DD></DL>
</UL>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;The
aggregate vested benefits accrued by the Participant as of the Effective Date of Termination under all other savings and retirement plans sponsored by the Company shall be
distributed pursuant to the terms of the applicable plans. </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;4.4&nbsp;&nbsp;Termination for Disability.</B></FONT><FONT SIZE=2>&nbsp;&nbsp;Following a Change in Control of the Company, if a Participant's
employment is terminated due to Disability, the Participant shall receive his/her Base Salary through the Effective Date of Termination, at which point in time the Participant's benefits shall be
determined in accordance with the Company's disability, retirement, insurance, and other applicable plans and programs then in effect. </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;4.5&nbsp;&nbsp;Termination for Death.</B></FONT><FONT SIZE=2>&nbsp;&nbsp;Following a Change in Control of the Company, if the Participant's
employment is terminated by reason of his/her death, the Participant's benefits shall be determined in accordance with the Company's survivor's benefits, insurance, and other applicable programs of
the Company then in effect. </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;4.6&nbsp;&nbsp;Termination for Cause or Other Than for Good Reason.</B></FONT><FONT SIZE=2>&nbsp;&nbsp;Following a Change in Control of the Company,
if the Participant's employment is terminated either: (a)&nbsp;by the Company for Cause; or (b)&nbsp;by the Participant (other than for Good Reason under circumstances giving rise to a Qualifying
Termination described in Section&nbsp;4.2(b)&nbsp;herein), the Company shall pay the Participant his/her full Base </FONT></P>

<P ALIGN="CENTER"><FONT SIZE=2>5</FONT></P>

<HR NOSHADE>
<!-- ZEQ.=7,SEQ=7,EFW="2044752",CP="CHIRON CORPORATION",DN="3",CHK=32282,FOLIO='5',FILE='DISK012:[01SFO8.01SFO1578]KE1578B.;8',USER='CSTCLAI',CD=';9-MAY-2001;11:42' -->
<A NAME="page_ke1578_1_6"> </A>
<BR>

<P><FONT SIZE=2>
Salary and accrued but unused paid time off in accordance with company policy through the Effective Date of Termination, at the rate then in effect, plus all other amounts to which the Participant is
entitled under any compensation plans of the Company, at the time such payments are due. </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;4.7&nbsp;&nbsp;Notice of Termination.</B></FONT><FONT SIZE=2>&nbsp;&nbsp;Any termination of employment by the Company or by the Participant for Good
Reason shall be communicated by a Notice of Termination. </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;4.8&nbsp;&nbsp;Release.</B></FONT><FONT SIZE=2>&nbsp;&nbsp;The Severance Benefits are in consideration of Participant's release of all claims against
the Company and its employees and agents, in the form provided by the Company and in substantially the form as attached hereto as Exhibit&nbsp;A (the "Release"). If Participant does not properly
execute the Release or if the Participant effectively revokes it, he or she will not be entitled to any Severance Benefits. </FONT></P>

<P><FONT SIZE=2><B>Article&nbsp;5. Form&nbsp;and Timing of Severance Benefits  </B></FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;5.1&nbsp;&nbsp;Form and Timing of Cash Severance Benefits.</B></FONT><FONT SIZE=2>&nbsp;&nbsp;The Severance Benefits described in Sections 4.3(a),
4.3(b), and 4.3(c)&nbsp;herein shall be paid in cash to the Participant in a single lump sum as soon as practicable following the latest of (i)&nbsp;the Effective Date of Termination or
(ii)&nbsp;the date that the Participant executes the Release or (iii)&nbsp;the last day following Participant's execution of the Release that the Participant may, by its terms, revoke such
Release, but in no event beyond thirty (30) days from such date. </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;5.2&nbsp;&nbsp;Withholding of Taxes.</B></FONT><FONT SIZE=2>&nbsp;&nbsp;The Company shall be entitled to withhold from any amounts payable under this
Plan all taxes as legally shall be required (including, without limitation, any United States federal taxes and any other state, city, or local taxes). </FONT></P>


<P><FONT SIZE=2><B>Article&nbsp;6. Excise Tax Equalization Payment  </B></FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;6.1&nbsp;&nbsp;Excise Tax Equalization Payment.</B></FONT><FONT SIZE=2>&nbsp;&nbsp;In the event that the Participant becomes entitled to Severance
Benefits or any other payment or benefit under this Plan, or under any other agreement with or plan of the Company (in the aggregate, the "Total Payments"), if all or any part of the Total Payments
will be subject to the tax (the "Excise Tax") imposed by Section&nbsp;4999 of the Code (or any similar tax that may hereafter be imposed), the Company shall pay to the Participant in cash an
additional amount (the "Gross-Up Payment") such that the net amount retained by the Participant from the Total Payments
and the Gross-Up Payment after deduction of any Excise Tax upon the Total Payments and any federal, state, and local income and employment tax, penalties, interest, and Excise Tax upon the Gross-Up
Payment provided for by this Section&nbsp;5.1 (including FICA), shall be equal to the Total Payments. Such payment shall be made by the Company to the Participant as soon as practicable following
the latest of (i)&nbsp;the Effective Date of Termination or (ii)&nbsp;the date that the Participant executes the Release or (iii)&nbsp;the last day following Participant's execution of the
Release that the Participant may, by its terms, revoke such Release, but in no event beyond thirty (30) days from such date. </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;6.2&nbsp;&nbsp;Tax Computation.</B></FONT><FONT SIZE=2>&nbsp;&nbsp;For purposes of determining whether any of the Total Payments will be subject to
the Excise Tax and the amounts of such Excise Tax: </FONT></P>

<UL>
<DL compact>
<DT><FONT SIZE=2>(a)</FONT></DT><DD><FONT SIZE=2>Any
other payments or benefits in the nature of compensation received or to be received by the Participant in connection with a Change in Control of the Company or the Participant's
termination of employment (whether pursuant to the terms of this Plan or any other plan, arrangement, or agreement with the Company or otherwise) shall be treated as "parachute payments" within the
meaning of Section&nbsp;280G(b)(2)&nbsp;of the Code, and all "excess parachute payments" within the meaning of Section&nbsp;280G(b)(1)&nbsp;shall be treated as subject to the Excise Tax,
unless in the opinion of tax counsel as supported by the Company's independent auditors and acceptable to the Participant, such other payments or benefits (in whole or in part) do not </FONT></DD></DL>
</UL>
<P ALIGN="CENTER"><FONT SIZE=2>6</FONT></P>

<HR NOSHADE>
<!-- ZEQ.=8,SEQ=8,EFW="2044752",CP="CHIRON CORPORATION",DN="3",CHK=421079,FOLIO='6',FILE='DISK012:[01SFO8.01SFO1578]KE1578B.;8',USER='CSTCLAI',CD=';9-MAY-2001;11:42' -->
<A NAME="page_ke1578_1_7"> </A>
<UL>
<UL>

<P><FONT SIZE=2>constitute
parachute payments, or unless such excess parachute payments (in whole or in part) represent reasonable compensation for services actually rendered within the meaning of
Section&nbsp;280G(b)(4)&nbsp;of the Code in excess of the base amount within the meaning of Section&nbsp;280G(b)(3)&nbsp;of the Code, or are otherwise not subject to the Excise Tax; </FONT></P>

</UL>
<DL compact>
<DT><FONT SIZE=2>(b)</FONT></DT><DD><FONT SIZE=2>The
amount of the Total Payments which shall be treated as subject to the Excise Tax shall be equal to the lesser of: (i)&nbsp;the total amount of the Total Payments; or
(ii)&nbsp;the amount of excess parachute payments within the meaning of Section&nbsp;280G(b)(1)&nbsp;(after applying clause (a)&nbsp;above); and
<BR><BR></FONT></DD><DT><FONT SIZE=2>(c)</FONT></DT><DD><FONT SIZE=2>The
value of any noncash benefits or any deferred payment or benefit shall be determined by the Company's independent auditors in accordance with the principles of Sections
280G(d)(3)&nbsp;and (4) of the Code. </FONT></DD></DL>
</UL>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;For
purposes of determining the amount of the Gross-Up Payment, the Participant shall be deemed to pay federal income taxes at the highest marginal rate of federal income taxation
(including the effects of applicable phase-outs of deductions and other benefits) in the calendar year in which the Gross-Up Payment is to be made, and state and local income taxes at the highest
marginal rate of taxation in the state and locality of the Participant's residence on the Effective Date of Termination. </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;6.3&nbsp;&nbsp;Subsequent Recalculation.</B></FONT><FONT SIZE=2>&nbsp;&nbsp;In the event the Participant ultimately owes more Excise Tax on the Total
Payments and the Gross-Up Payments than computed by the Company under Section&nbsp;6.1 herein, the Gross-Up Payment shall be recalculated based on the actual Excise Tax. </FONT></P>


<P><FONT SIZE=2><B>Article&nbsp;7. The Company's Payment Obligation  </B></FONT></P>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;The Company's obligation to make the payments and the benefits provided for herein, to the extent that the Participant qualifies for such payments and benefits
under the terms of this Plan, shall be absolute and unconditional, and shall not be affected by any circumstances, including, without limitation, any offset, counterclaim, recoupment, defense, or
other right which the Company may have against the Participant or anyone else. </FONT></P>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;The
Participant shall not be obligated to seek other employment in mitigation of the amounts payable or arrangements made under any provision of this Plan, and the obtaining of any
such other employment shall in no event effect any reduction of the Company's obligations to make the payments and arrangements required to be made under this Plan, except to the extent provided in
Section&nbsp;4.3(d)&nbsp;herein. </FONT></P>

<P><FONT SIZE=2><B>Article&nbsp;8. Arbitration  </B></FONT></P>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;Any dispute or controversy arising under or in connection with this Plan shall be settled by arbitration, conducted before a panel of three (3) arbitrators
sitting in a location selected by the Participant within fifty (50) miles from the location of his/her employment with the Company, in accordance with the rules&nbsp;of the American Arbitration
Association then in effect. </FONT></P>

<P><FONT SIZE=2>&nbsp;&nbsp;&nbsp;&nbsp;Judgment
may be entered on the award of the arbitrator in any court having proper jurisdiction. All expenses of such arbitration, including the fees and expenses of the counsel for
the Participant, shall be borne by the Company. </FONT></P>

<P><FONT SIZE=2><B>Article&nbsp;9. Successors and Assignment  </B></FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;9.1&nbsp;&nbsp;Successors to the Company.</B></FONT><FONT SIZE=2>&nbsp;&nbsp;The Company will require any successor (whether direct or indirect, by
purchase, merger, consolidation, or otherwise) of all or substantially all of the business and/or assets of the Company or of any division or subsidiary thereof to expressly assume and agree to </FONT></P>

<P ALIGN="CENTER"><FONT SIZE=2>7</FONT></P>

<HR NOSHADE>
<!-- ZEQ.=9,SEQ=9,EFW="2044752",CP="CHIRON CORPORATION",DN="3",CHK=341225,FOLIO='7',FILE='DISK012:[01SFO8.01SFO1578]KE1578B.;8',USER='CSTCLAI',CD=';9-MAY-2001;11:42' -->
<A NAME="page_ke1578_1_8"> </A>

<P><FONT SIZE=2>
perform the Company's obligations under this Plan in the same manner and to the same extent that the Company would be required to perform them if no such succession had taken place. </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;9.2&nbsp;&nbsp;Assignment by the Participant.</B></FONT><FONT SIZE=2>&nbsp;&nbsp;This Plan shall inure to the benefit of and be enforceable by the
Participant's personal or legal representatives, executors, administrators, successors, heirs, distributees, devisees, and legatees. If the Participant dies while any amount would still be payable to
him/her hereunder had he/she continued to live, all such amounts, unless otherwise provided herein, shall be paid in accordance with the terms of this Plan to the Participant's Beneficiary. If the
Participant has not named a Beneficiary, then such amounts shall be paid to the Participant's devisee, legatee, or other designee, or if there is no such designee, to the Participant's estate. </FONT></P>

<P><FONT SIZE=2><B>Article&nbsp;10. Miscellaneous  </B></FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;10.1&nbsp;&nbsp;Employment Status.</B></FONT><FONT SIZE=2>&nbsp;&nbsp;Except as may be provided under any other agreement between the Participant and
the Company, the employment of the Participant by the Company is "at will," and may be terminated by either the Participant or the Company at any time and for any or no reason, subject to applicable
law. </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;10.2&nbsp;&nbsp;Beneficiaries.</B></FONT><FONT SIZE=2>&nbsp;&nbsp;The Participant may designate one or more persons or entities as the primary and/or
contingent Beneficiaries of any Severance Benefits owing to the Participant under this Plan. Such designation must be in the form of a signed writing acceptable to the Committee. The Participant may
make or change such designations at any time. </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;10.3&nbsp;&nbsp;Severability.</B></FONT><FONT SIZE=2>&nbsp;&nbsp;In the event any provision of this Plan shall be held illegal or invalid for any
reason, the illegality or invalidity shall not affect the remaining parts of the Plan, and the Plan shall be construed and enforced as if the illegal or invalid provision had not been included.
Further, the captions of this Plan are not part of the provisions hereof and shall have no force and effect. </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;10.4&nbsp;&nbsp;Modification.</B></FONT><FONT SIZE=2>&nbsp;&nbsp;No provision of this Plan may be modified, waived, or discharged unless such
modification, waiver, or discharge is agreed to in writing and signed by the Participant and by an authorized member of the Committee, or by the respective parties' legal representatives and
successors. </FONT></P>

<P><FONT SIZE=2><B>&nbsp;&nbsp;&nbsp;&nbsp;10.5&nbsp;&nbsp;Applicable Law.</B></FONT><FONT SIZE=2>&nbsp;&nbsp;To the extent not preempted by the laws of the United States, the substantive laws
of the state of California, without regard to conflict of law principles, shall be the controlling law in all matters relating to this Plan. </FONT><FONT SIZE=2><B>[End of
Plan]  </B></FONT></P>

<P ALIGN="CENTER"><FONT SIZE=2>8</FONT></P>

<HR NOSHADE>
<!-- ZEQ.=10,SEQ=10,EFW="2044752",CP="CHIRON CORPORATION",DN="3",CHK=962559,FOLIO='8',FILE='DISK012:[01SFO8.01SFO1578]KE1578B.;8',USER='CSTCLAI',CD=';9-MAY-2001;11:42' -->
<BR>
<!-- Generated by Merrill Corporation (www.merrillcorp.com) -->
<BR>
<P><br><A NAME="01SFO1577_3">QuickLinks</A><br></P><!-- TOC_BEGIN -->
<FONT SIZE=2><A HREF="#toc_ke1578_1">Executive Change-in-Control Severance Plan</A></FONT><BR>
<FONT SIZE=2><A HREF="#toc_ke1578_2">CONTENTS</A></FONT><BR>
<FONT SIZE=2><A HREF="#toc_ke1578_3">Chiron Corporation Executive Change-in-Control Severance Plan</A></FONT><BR>

<!-- SEQ=,FILE='QUICKLINK',USER=CSTCLAI,SEQ=,EFW="2044752",CP="CHIRON CORPORATION",DN="3" -->
<!-- TOCEXISTFLAG -->
</BODY>
</HTML>
</TEXT>
</DOCUMENT>
