Autism is a developmental difference that affects how people think and experience the world. Autism is a normal part of human diversity. A fraudulent study published in 1998 has made some parents and caregivers think there is a link between vaccines and the development of autism. After nearly 30 years, no other research supports this claim. In fact, many studies have found the opposite: vaccines don’t cause autism. This fact sheet explains the origin of this myth, responds to other claims, and provides evidence that the MMR vaccine doesn’t cause autism.