Immunological dysfunction may be a possible risk factor for the development of autism.
Children with autism spectrum disorder (ASD) are more than twice as likely to have a food allergy.
The association between food allergy and ASD are stronger than the association of respiratory or skin allergy with ASD. Immunological studies have found that IgA, IgG, IgM, and total IgE were increased in children with ASD and imbalances in specific types of T-cells are also common.