Despite the loud clamor that continues from the “antivaxxer” community, yet another study confirms that vaccines don’t cause autism. To be even more clear, the measles-mumps-rubella (MMR) vaccine does not cause autism, does not trigger autism in susceptible children, and does not lead to clusters of autism cases, according to a new study published in the Annals of Internal Medicine.
This study involved more than 650,000 children born in Denmark between 1999 and 2010, with follow-up through August 2013. The researchers used population registries to examine MMR vaccination and other childhood vaccines, autism diagnoses, autism rates in siblings, and the presence or absence of autism risk factors like gender (the disorder is about four times more common in boys), family history, preterm birth and low birthweight, and other genetic conditions.
During the study period, 6,517 children were diagnosed with autism spectrum disorder. Compared with children who had not received the MMR vaccine, those who were vaccinated had no increased risk of autism, according to the researchers. The MMR vaccine also didn’t increase autism risk in subgroups of children in the study, including kids with a sibling history of autism, those with autism risk factors, and kids who received other childhood vaccines.
Since the myth linking the MMR vaccine to autism came about in 1998, there’ve been dozens of studies involving hundreds of thousands of children all over the world dispelling it. In spite of all the research, increased travel to areas without widespread vaccination coupled with pockets of people refusing vaccines has led to recent outbreaks of measles in the United States and in other places.