How has a movement with zero scientific evidence become one of the World Health Organization’s top 10 threats to public health?
NBC News’ Savannah Sellers breaks down the anti-vaccination movement -- how it got started, the debunked paper linking the MMR vaccine to autism and the measles outbreak we’re dealing with now.April 24, 2019
UP NEXT
Many of your top 40 favorites, were created by Black songwriters
01:51
These BIPOC Gen-Zers are voting for the first time – and hoping to decide the fate of their swing states
04:58
TikTok’s hype houses are educating first-time voters — but is the info accurate?