Whooping cough vaccine: Researchers call for an alternative Tdap immunization 'strategy for adolescents'
from Canada Journal
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 nine per cent after four years among teenagers who have received only a newer form of the whooping cough vaccine (acellular pertussis vaccine) as infants and children.
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