July 14 (UPI) -- A new study of more than 1.2 million people found no link between aluminum in childhood vaccines and long-term health problems, including autism, asthma or autoimmune diseases. The research, published Monday in the Annals of Internal Medicine , looked at 50 chronic conditions. They included 36 autoimmune diseases, nine types of allergies and asthma, and five neurodevelopmental disorders, such as autism and ADHD, NBC News reported. Aluminum has long been added to vaccines to