evidence: Although it may sound alarming for aluminium to be in a vaccine, it is actually all around us in everyday life too. According to the European Food Safety Authority, aluminium is produced by and used for "water treatment, papermaking, fire retardant, fillers, food additives, colours and pharmaceuticals". [...] Historically, some research suggested there may be a link between high levels of aluminium and Alzheimer’s disease, but there is not enough evidence to support this idea. Some other studies suggested that the aluminium in vaccines could be linked to autism spectrum disorders. But these studies were found to be "seriously flawed" by the World Health Organization’s Global Advisory Committee on Vaccine Safety. And research into aluminium-containing infant vaccines suggests that being exposed in this way carries "extremely low risk", even for babies. Since they first started being used in vaccines in the 1930s, aluminium salts have not been a cause for concern among medical professionals. The amounts used are considered too small to be dangerous, and they aren’t easily absorbed by the body, the CDC confirms.