“Vaccines do not cause autism,“ read the note, which is crowdsourced by users of the Elon Musk-owned social media platform. ”The scientific literature on this is so extensive, that claiming otherwise can only be explained through sheer ignorance, or some sort of nefarious political purpose.”

Trump has regularly promoted suspicion about vaccines causing autism going back to before he ran for president in 2015. In 2014, he tweeted, “Healthy young child goes to doctor, gets pumped with massive shot of many vaccines, doesn't feel good and changes - AUTISM. Many such cases!”