Why? If not the vaccines ... is it the immunology of rare individuals (with ASD genetics)? I. Introduction Research suggests a significant link between autism spectrum disorder (ASD) and attention deficit hyperactivity disorder (ADHD) with immune system abnormalities, indicating that issues with the immune system may play a role in the development of these neurodevelopmental disorders; studies have shown elevated levels of inflammatory cytokines, altered immune cell populations, and potential connections to autoimmune diseases in individuals with ASD and ADHD, particularly when considering a family history of allergies or autoimmune conditions. Key points about the connection between autism, ADHD, and immunology: Immune dysregulation: Both ASD and ADHD are increasingly associated with an imbalance in the immune system, showing elevated levels of pro-inflammatory cytokines which can impact brain development and function. Maternal immune activation: Research indicates that a ...