News Headlines Article

Whooping Cough Vaccine Effectiveness Fades — and Fast
KQED Radio

Lately, Californians have been focused on a significant measles outbreak that just ended. But in the last five years, state health officials have declared an epidemic of whooping cough (also known as pertussis) twice — in 2010 and in 2014, when 11,000 people were sickened and three infants died.

Now a new analysis from a recent whooping cough epidemic in Washington state shows that the effectiveness of the Tdap vaccine used to fight whooping cough waned significantly. For adolescents who received all their shots, effectiveness within one year of the final booster was 73 percent. That rate plummeted to 34 percent within two to four years.