CHICAGO - OCTOBER 8: Three 10-dose Influenza Virus Vaccine vials are seen at Ballin Pharmacy October 8, 2004 in Chicago, Illinois. The Food and Drug Administration said October 8 that it is unlikely clear the British Chiron Corp.'s flu vaccine for U.S. use. British regulators shut down Chiron's plant after worries about unsanitary conditions. (Photo by Tim Boyle/Getty Images)
