VACCINE AFFECT

Critics argue that the study was not sensitive enough to rule out a modest effect.

The 2002 Danish cohort study by Madsen and colleagues is often cited as a cornerstone in the argument against any link between MMR vaccination and autism. However, one of the most important criticisms centres on the fact that the study used diagnosis dates rather than the onset of symptoms.

This study is often quoted as proof that MMR has nothing to do with autism, but its methods were too vague to rule anything out with confidence. It was a limited statistical exercise, not a definitive answer.