Autism is a spectrum disorder characterized by challenges with social skills, repetitive behaviors, speech and nonverbal communication, as well as by unique strengths and differences. It varies from person to person and is not defined by one specific set of signs and symptoms. There is no cure for autism, but early intervention and support can improve outcomes.
Autism is a naturally occurring neurodevelopmental variation and it is generally agreed that it is not caused by parenting or environmental factors. It is not contagious and there is no evidence that vaccines cause autism. While the exact cause of autism is unknown, research suggests that both genetics and environment play a role.