A large US study suggests there is no link between receiving the MMR vaccine before age 2 and later autism. The findings add to a long-running body of research that has not found evidence connecting the measles, mumps and rubella shot to autism.

According to the report, the new analysis reinforces existing evidence on MMR vaccine safety. That matters because questions about childhood vaccination timing and autism risk continue to circulate, even though earlier research has repeatedly reached the same conclusion.

The study focuses specifically on MMR vaccination before age 2, an important period in the routine childhood immunization schedule. By examining that window, the researchers add more data to the broader scientific record on whether early vaccination changes autism risk.

Overall, the findings support current understanding that MMR vaccination is not associated with autism and back the safety profile of a vaccine widely used to protect children against measles, mumps and rubella.