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Whooping Cough Vaccine Weakens Over Time

An outbreak in 2010 and a recent resurgence of pertussis, or whooping cough, have led scientists to investigate the efficacy of the diphtheria, tetanus, and acellular pertussis (DTaP) vaccine. The study, published in The New England Journal of Medicine, looked specifically at the time between the last dose and the onset of disease in children who acquired pertussis. The report showed that children “who tested positive for pertussis had received their last DTaP dose 1,699 days earlier, compared with 1,028 days for those testing negative.”

Read it in The New England Journal of Medicine.