"Manor also discussed a population-based case-control study in which she and her colleagues examined the rates of infectious disease in children and adolescents with ADHD compared to a non-ADHD control group with similar demographics. They consulted the electronic medical records of 18,756 patients with ADHD and 37,512 controls without ADHD, all aged 5 to 18, with attention to the exposure categories pediatric ID, anti-infective medications, and number of physicians’ visits. Results showed that the rates for all 3 exposure categories were significantly higher in the patients with ADHD than in the control group. According to Manor, this means children and adolescents with ADHD experience higher occurrences of childhood infectious diseases, receive more prescriptions for anti-infective medications, and have more visits with physicians and other medical experts, suggesting a clear connection between ADHD and childhood infectious diseases.1"
https://www.psychiatrictimes.com/view/adhd-infections-and-the-immune-system