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Whooping Cough ‘Booster’ Vaccine Protection Fades Quickly, Kaiser Study Shows
KQED Radio

In the late 1990s, a new version of the whooping cough vaccine was introduced. The big benefit was that it had fewer side effects. But in the years since, evidence has been mounting that this newer vaccine loses its effectiveness — and fast. Now, another study sheds light on how well the “booster” dose works. California requires this booster — called Tdap — for all incoming 7th graders.