Evidence supports it, so why are parents still reluctant to vaccinate their children?

Nearly 16 years after his controversial study was first published, the work of the discredited British doctor Andrew Wakefield - the researcher who linked the measles, mumps and rubella vaccine with autism - is back in the news. Since 2010, Wakefield has been barred from practicing medicine in the UK. He now lives and works in the US where he retains a cult following.

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