There's no link between autism and the vaccine that prevents measles, mumps and rubella, according to a new study that challenges a push by some parents against vaccinating their children.
The study in Denmark is one of the largest research projects examining the issue. It comes as states face measles outbreaks that many health officials are blaming on the so-called anti-vaxxer movement.
"The study strongly supports that MMR vaccination does not increase the risk for autism, does not trigger autism in susceptible children, and is not associated with clustering of autism cases after vaccination," the authors wrote in the study published this week in the Annals of Internal Medicine.
Researchers studied over 650,000 children born in Denmark from 1999 through 2010 and used Danish population registries to gather information on vaccinations, autism diagnoses and other risk factors, such as if the child had a sibling diagnosed with autism.