Final answer:
Autism spectrum disorder (ASD) is a neurodevelopmental disorder characterized by deficits in social interaction, communication, and repetitive behaviors. The exact cause of ASD is unknown, but it is believed to be a combination of genetic and environmental factors. There is no scientific evidence linking vaccinations to autism.
Step-by-step explanation:
Autism spectrum disorder (ASD) is a neurodevelopmental disorder characterized by deficits in social interaction, verbal and nonverbal communication, and engagement in repetitive behaviors or interests. The exact cause of ASD is largely unknown, but it is believed to be a result of a combination of genetic and environmental factors. While some genetic forms of autism have been identified, most cases of ASD are thought to involve multiple gene mutations. It is important to note that there is no scientific evidence linking vaccinations to autism.