Claims “massive vaccinations” cause autism

Trump fired off a string of tweets saying “I am being proven right about massive vaccinations—the doctors lied,” urging parents to give children “one vaccine at a time” because “tiny children are not horses,” even though public-health authorities have repeatedly debunked any link between routine immunizations and autism.

"I am being proven right about massive vaccinations—the doctors lied. Save our children & their future." — Tweet thread on September 3, 2014 attacking childhood vaccination schedules