We also removed related targeting options, like 'vaccine controversies'.
Anti-vaccine views, which have been prevalent for quite some time, are spread by people who believe that either vaccine doesn't work or that they are unsafe to health, and are vehemently opposed to vaccination and will not tolerate any form of criticism against anti-vaccination.
There has been a widespread measles outbreak in the United States and elsewhere, especially with measles vaccination having being linked to causing autism, which of course has been disproved with numerous studies demonstrating the falsity of this belief.
In a blog post, Monika Bickert, Facebook's head of global policy management, said the company is "working to tackle vaccine misinformation on Facebook by reducing its distribution and providing people with authoritative information on the topic".
Facebook announced that it will reduce the exposure of groups and pages that spread incorrect facts on vaccines with the help of the World Health Organization (WHO), the Center for Disease Control and the Center for Disease Prevention.
When it discovers ads with misinformation about vaccinations, "we will reject them".
Facebook said that it would rely on vetting from leading global health organizations that "have publicly identified verifiable vaccine hoaxes".
In it, he expressed concern that Facebook and Instagram, which the company also owns, are "surfacing and recommending messages" that discourage children's vaccination. The World Health Organization recently dubbed "vaccine hesitancy" one of the top global threats of 2019.
The mother of two children, aged six and nine, said the site that has been widely accused of allowing misinformation to continue on a range of topics needs to do more to protect youth from "dangerous" groups that deal in paranoia, not science.
Federal health officials have attributed a recent spike in the number of measles cases in part to misinformation that has made some parents shun the vaccine.
In February, Rep. Adam Schiff, D-Calif., sent letters to the heads of Facebook and Google, which also has been under fire for YouTube's role in promoting misinformation, asking how they plan to protect their users from potentially unsafe hoaxes.