[juliangoldsmith]

Daraprim is used for the treatment of toxoplasmic encephalitis, which can happen when someone has both AIDS and toxoplasmosis.

There were 39,513 AIDS patients in the United States in 2015. About 23% of Americans have toxoplasmosis, so that would be 9087 people who could get toxoplasmic encephalitis. Around 10% of people with toxoplasmosis develop toxoplasmic encephalitis [0], which would be 909 people who need Daraprim.

A course of Daraprim costs $75,000. For 909 people, that would be a total of $68,175,000. Approximately 100M people in the United States have insurance, so that would raise your insurance cost by about $0.68.

[0] 10.2% seroprevalence of toxoplasmosis, and 1.2% incidence of toxoplasmic encephalitis in the study at http://journals.sagepub.com/doi/pdf/10.1258/0956462053654230