Chris Mooney links vaccine denialism to the political left. His caveat:
What’s tricky is, there’s not a standard left-right political ideology underlying this. Rather, it seems more associated with a Whole Foods and au natural lifestyle that, while certainly more prominent on the bicoastal left, isn’t the same as being outraged by inequality or abuses of the free market.
You see as much enthusiasm for homeopathy, chiropractic, herbal remedies and other forms of folk medicine on the far right as on the far left, and for the same fundamental reason: distrust of expertise, of the scientific method, and of the good intentions of the authorities. The American political landscape is shaped in much weirder ways than Beltway debates over taxes and spending usually allow.
And don't forget the anti-conspiratorial HuffPo!