evidence: While genetic and environmental reasons for autism have been found, vaccines are not among those reasons.[3] In fact, one vaccine, the rubella vaccine has been found to have a protective effect in preventing rubella during pregnancy. Rubella during pregnancy can lead to children born with congenital rubella syndrome (CRS), which include symptoms of autistic behavior and developmental delay.[4] The rubella vaccine is part of the combined measles, mumps, rubella (MMR) vaccine. [...] Perhaps the easiest answer to why vaccines were associated with autism to begin with is the age at which childhood vaccines are given and when the first signs of developmental delay are typically seen. In the United States, the vaccine schedule recommends certain vaccines be given between birth and twelve months of age. At the same time, signs of a developmental delay – like the delays seen with autism – show up around the time a child should start to speak and interact more fully with people around them. [...] 18. Knopf A. Time to remember: Vaccines don't cause autism. The Brown University Child and Adolescent Behavior Letter. 2021;37(7):9-10. doi:10.1002/cbl.30559