How the measles outbreak is a quintessential political issue of our time

In just three months this year, there have been more than 200 reported measles cases. Measles is extremely contagious. It’s also preventable. But some people are refusing to vaccinate, despite all credible science saying it’s safe. The questioning of science and medicine is all political, says New Yorker writer Masha Gessen. She likens doubts around vaccinations to believing in political conspiracy theories on Facebook.