The research supports decades of work with similar results, including by the World Health Organization, which said earlier this year there was no evidence that vaccines cause autism. Trump wants Kennedy to study any ties between autism and vaccines - despite current and established evidence. The president previously suggested the combined MMR vaccine was “bad” and should be split up during a September press conference on autism. Kennedy has acknowledged studies have shown no link between the MMR vaccine and autism, according to The New York Times. open image in gallery A woman holds her young daughter while she gets the MMR vaccine at a clinic in Lubbock, Texas, last year.