I just had occasion to track down this old chestnut:
http://www.sciencemag.org/news/2011/01/why-prius-driving-composting-set-fears-vaccines?source=acsh.org
Specifically where the bit where he recounts
I talked to a public health official and asked him what’s the best way to anticipate where there might be higher than normal rates of vaccine noncompliance, and he said take a map and put a pin wherever there’s a Whole Foods. I sort of laughed, and he said, “No, really, I’m not joking.” It’s those communities with the Prius driving, composting, organic food-eating people.