AP
British regulators unexpectedly shut down a major flu-shot supplier Tuesday, citing manufacturing problems at the Chiron Corp. factory in England where roughly 46 million doses destined for the United States had been made.
That means only about 54 million flu shots will be available this year from a competing firm, and the government decided Tuesday that most healthy adults should delay or skip them to leave enough vaccine for the elderly and other high-risk patients.
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