Kaiser Permanente study finds effectiveness of routine Tdap booster wanes in adolescents

A new study from Kaiser Permanente’s Vaccine Study Center found that the Tdap booster vaccine provides moderate protection against whooping cough during the first year after vaccination, but its effectiveness wanes to less than 9 percent after four years among teenagers who have received only a newer form of the whooping cough vaccine (acellular pertussis vaccine) as infants and children. These findings were published today in Pediatrics.

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