News Headlines Article

Why did so many California kids get whooping cough despite being vaccinated?
Los Angeles Times

When California had its biggest pertussis outbreak in more than half a century in 2010, the kids who fell sick most were 10- and 11-year-olds.

That struck public health experts as odd.

Children receive five doses of the vaccine that protects against the illness — also known as whooping cough — by the time they’re 6, so that population should have been fully inoculated.