News Headlines Article

Whooping Cough Vaccine’s Protection Fades Quickly
National Public Radio

Lately, Californians have been focused on a measles outbreak that got its start at Disneyland. But in the past five years, state health officials have declared epidemics of whooping cough twice — in 2010 and in 2014, when 11,000 people were sickened and three infants died.

Now an analysis of a recent whooping cough epidemic in Washington state shows that the effectiveness of the Tdap vaccine used to fight the illness (also known as pertussis) waned significantly. For adolescents who received all their shots, effectiveness within one year of the final booster was 73 percent. The effectiveness rate plummeted to 34 percent within two to four years.

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