Yeah, I guess:

> Andrew Jeremy Wakefield (born 3 September 1956[a]) is an English fraudster and anti-vaccine activist. Formerly a senior surgeon, he was struck off the British medical register in 2010 for "serious professional misconduct" due to his involvement in the fraudulent 1998 Lancet MMR autism report, (wikpedia)

Sadly debunking fraud doesn't seem to stop the misinfo on social media. "Vaccines cause autism!" gets more clicks than the truth and so you get JFK Jr.