Autism is also called as Autism spectrum disorder (ASD), Indicates to a wide range of illnesses characterized by challenges with social skills, repetitive behaviors, speech and nonverbal communication. Coming up to the Centers for Disease Control, autism affects an expected 1 in 59 children in the United States today. Prenatal viral infection has been known as the principal non-genetic cause of autism. Prenatal coverage to rubella or cytomegalovirus initiates the mother's immune response and may greatly increase the risk for autism in mice. Congenital rubella syndrome is the greatest convincing environmental cause of autism.

These are some of the characteristics of ASD:

Difficulties with social interaction with others.
Infrequent interest in objects
Essential for sameness
Huge variation in abilities
Under or over reaction to one or more of the five senses: sight, touch, taste, smell, or hearing
Frequent actions or body movements