keywords: vaccine flu shots british chiron
text: British Flu Vaccine Problem to Be Used As Example By DIEDTRA HENDERSON     WASHINGTON (AP) -- As the nation prepared for a severe shortage of flu shots, the Food and Drug Administration said Monday that problems at the British plant that manufactured vaccine withheld by British authorities likely will be used as a "test case" to lobby for better information-sharing with European regulators.    Last Tuesday, British authorities blocked Chiron Corp...