Whooping cough study may explain recent eipidemic

Whooping cough study may explain recent epidemic of pertussis outbreak

http://www.nytimes.com/2013/11/26/health/study-finds-vaccinated-baboons-can-still-carry-whooping-cough.html
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Whooping Cought and other Vaccines

http://www.nytimes.com/health/guides/disease/pertussis/print.html
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