Chiron and SourceCF Announce Settlement Agreement; Lawsuit Over Produc

    Business Editors/Health/Medical Writers
    BIOWIRE2K

    EMERYVILLE, Calif. & HUNTSVILLE, Ala.--(BUSINESS WIRE)--March 4, 2005--Chiron Corporation (Nasdaq:CHIR), SourceCF Inc., and SourceCF Clinical Research and Development L.L.C. today announced that they have reached a settlement of the lawsuit initiated by Chiron in October 2004. The case was resolved to the mutual satisfaction of the parties in order to avoid the time, expense and risk of continuing litigation. The specific terms of the parties' agreement are confidential, but neither of the SourceCF entities admitted any liability.

    About Chiron

    Chiron delivers innovative and valuable products to protect human health by advancing pioneering science across the landscape of biotechnology. The company works to deliver on the limitless promise of science and make a positive difference in people's lives. For more information, please visit www.chiron.com.

    About SourceCF

    SourceCF Clinical Research and Development was formed to serve the cystic fibrosis community through the development of new treatment options aimed at improving the lives of people with disease. SourceCF Clinical Research and Development is a privately held company based in Huntsville, Alabama. Additional information is available online at www.sourcecf.com.

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CONTACT: Chiron Corporate Communications & Investor Relations Media, 510-923-6500 Investors, 510-923-2300 or SourceCF Michael J. Walters, 256-704-4880

KEYWORD: CALIFORNIA ALABAMA INDUSTRY KEYWORD: PHARMACEUTICAL MEDICAL BIOTECHNOLOGY MARKETING AGREEMENTS SOURCE: Chiron Corporation

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