evidence: A Large Study Provides More Evidence That MMR Vaccines Don't Cause Autism [...] A large study released Monday finds no evidence that the vaccine that protects against measles, mumps and rubella increases the risk of autism. The study of children born in Denmark is one of the largest ever of the MMR vaccine. [...] "The idea that vaccines cause autism is still around despite our original and other well-conducted studies," Hviid wrote in an email. "Parents still encounter these claims on social media, by politicians, by celebrities, etc."