[V]accination is not an individual choice to be made by a parent for his or her own offspring. It’s a public health issue, because the diseases contracted by unvaccinated children are a threat to the community. That’s what public health is all about, and an overly tolerant approach to non-medical exemptions – and publicity given to anti-vaccination charlatans like Wakefield and McCarthy by heedless promoters like, sadly, Katie Couric, affect us all.