http://www.slate.com/articles/health_and_science/medical_examiner/2015/09/generic_drug_price_gouging_how_shkreli_and_other_monopolists_cornered_the.html

A few months ago, I treated a patient for a case of pinworm, a parasitic infestation that affects roughly 400 million people worldwide, with 40 million of those cases occurring within the United States. Though pinworms can be found in middle-class suburbs, the parasite is common in settings of urban poverty, including the low-rise public housing complexes across the street from my East Baltimore clinic, where far too many people struggle to survive on less than $2 a day.