Robert F. Kennedy Jr. is the single leading source of anti-vax ads on Facebook
Anti-vax people are also anti "big pharma", and often anti-pesticide. Contamination paranoid.
Kennedy is also in Vaxxed II: The People's Truth (2019), which Imdb labels Documentary, Fantasy!
https://arstechnica.com/science/2019/11/robert-f-kennedy-jr-is-the-single-leading-source-of-anti-vax-ads-on-facebook/
Just two organizations were responsible for the majority of anti-vaccine advertisements on Facebook before the social media giant restricted such content in March of this year, according to a November 13 study in the journal Vaccine.
The World Mercury Project, which ran the most ads of any single source, is an organization closely aligned with the anti-vaccine group Children's Health Defense. Both are spearheaded by Robert F. Kennedy Jr., an environmental lawyer turned prolific peddler of dangerous anti-vaccine misinformation. He and his organizations promote conspiracy theories about vaccine safety, including the roundly debunked claim that safe, life-saving immunizations are linked to autism. More recently, Kennedy has become a prominent opponent of laws aimed at increasing vaccination rates among school children.
The academic study drawing attention to Kennedy's and Cook's efforts is based on data mined from Facebook's Ad Library. The library is an open, searchable repository of advertisements that the social media giant deems related to politics and "issues of national importance." Facebook set up the repository as an effort to appear more transparent in the wake of scandals, namely the misappropriation of data by Cambridge Analytica and the revelation that Russian operatives had weaponized Facebook ads to meddle in US politics.
After the study was complete, Facebook announced a crackdown on anti-vaccine misinformation, including ditching anti-vaccine ads. Though some of the changes have gone into effect—including the banishing of some ads—the authors cautiously note that the "full impact of these policies remains to be seen."