I had mixed feelings when I first heard it, I thought it had something to do with mercury. I know the USA had all these rules about keeping mercury away from kids, even small doses can cause severe damage, BUT it's perfectly safe in dental fillings! Honest...

So, I was skeptical at first, but it does seem to be bad research on Wakefield's part. According to Wikipedia, the MMR vaccine can have some bad side effects (very rare) but the benefits seem to far outweight the downsides.