As a disturbing number of measles outbreaks crop up around the United States, Facebook is facing challenges combating widespread misinformation about vaccinations on its platform, which has become a haven for the anti-vaccination movement.
The World Health Organization recently named “vaccine hesitancy” as one of the biggest global health threats of 2019. But on Facebook, in public pages and private groups with tens of thousands of members, false information about vaccines — largely stemming from a now-debunked 1998 study that tied immunizations to autism — is rampant and tough to pin down. In the bubble of closed groups, users warn against the dangers of vaccinations, citing pseudoscience and conspiracy theories.