Abdominal Aortic Aneurysm Acanthamoeba Infection ACE (Adverse Childhood Experiences) Acinetobacter Infection Adenovirus Infection ADHD [Attention Deficit/Hyperactivity Disorder] AFib, AF (Atrial fibrillation) African Trypanosomiasis AHF (Alkhurma hemorrhagic fever) Alkhurma hemorrhagic fever (AHF) ALS [Amyotrophic Lateral Sclerosis] Alzheimer’s Disease Amebiasis, Intestinal [Entamoeba histolytica infection] American Trypanosomiasis [Chagas Disease] Anaplasmosis, Human Ancylostoma duodenale Infection, Necator americanus Infection Angiostrongylus Infection Anisakiasis Anthrax [Bacillus anthracis Infection] Antibiotic and Antimicrobial Resistance Arenavirus Infection Arthritis Childhood Arthritis Fibromyalgia Gout Osteoarthritis (OA) Rheumatoid Arthritis (RA) Aseptic Meningitis Aspergillus Infection [Aspergillosis] Asthma Autism Avian Influenza