ATLANTA — Health officials are warning that the whooping cough vaccine doesn’t last a lifetime — as an outbreak in Vermont demonstrated last year. The outbreak had 290 people hacking, almost half of them teen-agers. googletag.cmd.push(function () { // Define Slot var slot_sizes = [[300,250]];… Read More
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CDC: Vaccine may wear off years later
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CDC: Vaccine may wear off years later