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A member asked:

I am curious if an adult had the whooping cough vaccine and test positive ?

A doctor has provided 1 answer

Confusing question: An adult can test positive for pertussis after receiving the normal childhood pertussis vaccines.The immunity to the childhood series can weaken over time & today many adults get the tdap (acellular pertussis with tetanus & diphtheria booster) to reduce their risk of bring pertussis home to a newborn.

Answered 5/29/2013

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