Recent studies show that immune system differences—particularly in regulatory T cells (Tregs) and natural killer (NK) cells—are linked to autism. UC Davis researchers found that children with autism often have altered Tregs, which may contribute to neuroinflammation and behavioral symptoms. Restoring these cells in animal models reduced inflammation and improved social behaviors. Other studies note elevated immune cell activity (like T cells and NK cells) in autistic individuals, suggesting chronic inflammation could play a role.

For more details, check out the UC Davis MIND Institute's findings here: [https://health.ucdavis.edu/new....s/headlines/regulato Hope this helps!