I had known for quite some time that the study linking MMR vaccine had long since been shown to be unreliable as other studies had not replicated it or contradicted it. I had blogged about this and in short there is no link between MMR and autism.
What is more shocking though is an investigation by my favourite paper (The Times) that the data had actually been faked. More details here.
The original study caused vaccination rates to plummet, measles to come back and people to die. I think it should even be considered if Dr Andrew Wakefield should be tried for manslaughter.