Yup, good post. Also, the immunity conferred by a vaccine drops over time (that's why there's booster shots....kerching!). An adult that hasn't been vaccinated in 20 years won't have immunity to lots of the diseases he was vaccinated for as a kid.... so 'the herd' is waaaaaaay below the supposed necessary levels & yet doesn't have massive out breaks of the diseases. Herd immunity, mah I don't buy it.