In the first part of this series, we broadly touched on environmental and medical history as new (to us) areas of discussion. We examined the impact of poor policy on lead regulation and the “silent epidemic” of lead poisoning in the 1960s. We wonder what silent epidemics afflict us today as we look for lessons from these fields. So today we turn to what could be a modern day epidemic that has far reaching consequences, chemical contaminants and environmental sensitivities.