https://www.cnet.com/news/facebook-to-remove-anti-vaccination-recommendations-after-backlash/

Facebook said it will rely on the World Health Organization and the US Centers for Disease Control and Prevention to help identify vaccine conspiracies, the company said in a blog post. Facebook will also reject ads that include misinformation about vaccines and won't allow advertisers to target users interested in topics such as "vaccine controversies." 

The effort to combat anti-vaccination misinformation will include other sites Facebook owns. Recommendations for vaccine misinformation won't be displayed in Instagram's "Explore" section, which surfaces posts based on the content a user likes. Instagram also won't recommend the information on pages that display hashtags, which are designed to help users find posts about a particular topic.