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Pertussis vaccine appears to lose strength over time

from Pharmacy Times

The United States is on track to have the highest number of whooping cough cases this year since the late 1950s, despite a high rate of vaccination against the condition. Many have suspected that the waning effectiveness of the diphtheria, tetanus, acellular pertussis vaccine over time is to blame for recent outbreaks. Support for this hypothesis can be found in a new study published in the New England Journal of Medicine. more

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