Despite concerns by some parents that their children receive “too many vaccines too soon,” a new study finds that many shots, even on the same day, do not increase the risk of autism.
In the first six months of life, children receive as many as 19 vaccine doses of six different vaccines, and by the time they are 6 years old, a total of 25 doses from 10 vaccines. In a 2011 survey, about a third of parents expressed concerns that their child received too many vaccines before age 2, and too many vaccines on a single day.
Previous studies have found no link between the number of vaccines a child receives and their risk of several neurological conditions (though these studies did not specifically consider autism). The new study went a step further by looking at the link between a child’s total exposure to antigens – the proteins in vaccines that stimulate the body’s immune system – and his or her risk of autism.