MMR library
MMR and autism
What is 'regressive autism'?
It has been suggested that there is a new condition called Regressive Autism(where a child seems to be developing normally but starts to show signs of autism between 1 and 3 years of age) - where children lose skills like speech and actions, and that this occurred after MMR.
This has been studied and it has been proved that the proportion of autistic children with regression is the same whether they have had MMR or not, and that there has been no increase in the proportion with regression after MMR was introduced.
This means that MMR has not caused their regression.
Despite what the stories say, there has not been a single study that has shown a risk of the MMR vaccine causing autism. But, there have been many studies that cannot find a link.
The scientific evidence is that MMR does not cause autism.
- Introduction
- Why do some parents link MMR with autism in their child?
- Some parents have reported children becoming autistic shortly after MMR: is this cause and effect or coincidence?
- What is 'regressive autism'?
- More children are being diagnosed as autistic - is this related to MMR?
- Autism & MMR studies
- How might MMR be linked to autism?
- Is there any evidence for or against a link between MMR and autism?
- Measles, mumps and rubella - the diseases and autism
- Autism and the introduction of MMR
- Does MMR cause autism?




