In this video titled “The Lesser Known Ultraviolet Killer” posted to YouTube on May 5, 2008, Dr. Joseph Mercola talks about “the dangers of sun exposure and how you can prevent yourself from cancer.” About a dozen influential anti-vaxxers — including Chicago-born and trained physician Dr. Joseph Mercola — were responsible for nearly two-thirds of anti-vaccine content on social media, according to a report released by the Center for Countering Digital Hate last year. (YouTube)
