By Dr. Liji Thomas, MD Reviewed by Lauren Hardaker Jul 17 2025 In the largest study of its kind, researchers examined aluminum exposure from vaccines in 1.2 million children, and found no increased risk of autism, asthma, or autoimmune disease. Study:  Aluminum-Adsorbed Vaccines and Chronic Diseases in Childhood: A Nationwide Cohort Study . Image credit: Drazen Zigic/Shutterstock.com Aluminum is an effective and common adjuvant used in multiple non-live childhood vaccines. Some recent studies