1 There is no known single cause for autism spectrum disorder, but it is generally accepted that it is caused by abnormalities in brain structure or function. Brain scans show differences in the shape and structure of the brain in children with autism compared to in neurotypical children. Researchers do not know the exact cause of autism but are investigating a number of theories, including the links among heredity, genetics and medical problems.

2 More than 3.5 million Americans live with an autism spectrum disorder.

3 Although autism is hard to diagnose before 24 months, symptoms often surface between 12 and 18 months. If signs are detected by 18 months of age, intensive treatment may help to rewire the brain and reverse the symptoms.

4 yes because my cousin , friend that lives next door and my boyfriend they all have autism and it is a good thing to do because  my family we do a lot of things for autism we do the walk for autism and  i think that its a good idea to promote autism