Chiron to Release Earnings on Wednesday, April 21, 2004

Chiron to Release Earnings on Wednesday, April 21, 2004
Conference Call/Webcast to Follow 


EMERYVILLE, Calif., April 7  /PRNewswire-FirstCall/ -- Chiron Corporation  today
announced that it will release its first-quarter 2004 financial results on
Wednesday, April 21, at 4:00 p.m. EDT.

Forty-five minutes later, at 4:45 p.m. EDT, as part of its efforts to ensure
full disclosure to all parties, Chiron will webcast an earnings discussion
conference call live from Chiron.com.

To access either the live call or the one-week archive, please log on to
http://www.chiron.com/webcast.  Please connect to the website at least 15
minutes prior to the conference call to ensure adequate time to download any
necessary software.  Alternatively,please call 800-374-0907 from the U.S. or
Canada or 706-643-3367 from other locations.  Replay is available approximately
two hours after the completion of the call through 11:55 p.m. EDT, Wednesday,
April 28, 2004.  To access the replay, please call 800-642-1687 from the U.S. or
Canada or 706-645-9291 from other locations.  The conference ID number is
6631837.

About Chiron

Chiron Corporation, headquartered in Emeryville, California, is a global
pharmaceutical company that leverages a diverse business model to develop and
commercialize high-value products that make a difference in people's lives. The
company has a strategic focus on cancer and infectious disease.  Chiron applies
its advanced understanding of the biology of cancer and infectious disease to
develop products from its platforms in proteins, small molecules and vaccines. 
The company commercializes its products through three business units: 
BioPharmaceuticals, Vaccines and Blood Testing.  For more information about
Chiron, visit the company's website at http://www.chiron.com/. 

DATASOURCE: Chiron Corporation



CONTACT:  Chiron Corporate Communications & Investor Relations, media,

[phone], or investors, [phone]



Web site:  http://www.chiron.com/ 

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