What just happened? Facebook has become the latest company to clamp down on the spread of misinformation surrounding vaccinations.
Last month, The Daily Beast found almost 150 anti-vaccine advertising spots on Facebook that specifically target women over the age of 25, which is the demographic most likely to have children needing vaccinations.
To mitigate the spread of vaccine misinformation on its platform, Facebook is collaborating with a number of established health organizations to identify and verify factually accurate vaccine-related content. In fact, Facebook won't remove those groups or pages; instead, they won't appear in recommendations or predictions when searched for on the site.
On Tuesday, teenager Ethan Lindenberger told the Senate Committee on Health, Education, Labor and Pensions that his mother refused to give him vaccinations based on information she read on Facebook.
Rep. Adam Schiff (D-Calif.) sent a letter last month to Zuckerberg expressing concern that Instagram and Facebook were "surfacing and recommending messages that discourage parents from vaccinating their children".
Ms Bickert said the social network was also looking into ways of providing more information on the topic to users of Facebook. While Facebook will not be taking down these anti-vaccine groups and pages, the company will be lowering their rankings and reducing their distribution in the News Feed and Search.
Facebook becomes the next company to take a stand against the anti-vaccine movement with their announcement of new policies against the spread of false information about vaccines.
About 175,000 accounts followed one or more of these pages, and around 4,500 accounts followed one or more of these Instagram accounts.
Facebook said on Thursday the people behind the fake accounts frequently posted about local and political news including topics like immigration, free speech, racism, LGBT issues, far-right politics, issues between India and Pakistan, and religious beliefs including Islam and Christianity. We've also removed related targeting options, like "vaccine controversies". So, who decides what information is hoax or real? While some of them are already live, some remain in testing phases.
Last year, the UK's Advertising Standards Authority banned a Facebook ad paid for by a US-based anti-vaccination campaign group.