Here's a good article by Sam Reisman on the Anti-Vaxx movement. It contains many links to other pieces that expand upon and verify what he says. A particularly interesting point is when he notes, "The to-vaxx-or-not-to-vaxx issue has forged a strange fellowship between black helicopter right wingers, who believe vaccination is just a step away from martial law, and crunchy granola left wingers who buy into the fallacy of an 'all-natural' lifestyle." Yeah.