Chiron Corporation Recalls And Withdraws MORUPAR(R) MMR Vaccine From Italian And Developing World Markets; Revises 2005 Earnings

EMERYVILLE, Calif.--(BUSINESS WIRE)--March 16, 2006--Chiron Corporation (NASDAQ: CHIR) today announced that it is recalling and withdrawing its measles, mumps and rubella (MMR) vaccine, MORUPAR(R). Chiron supplied approximately 5 million doses of MORUPAR vaccine in 2005, providing most of its production to a limited number of developing countries, largely via the United Nations Children's Fund (UNICEF) and the Pan American Health Organization (PAHO), and approximately 450,000 doses to Italy.