" How much does it cost to treat leprosy? One $3 dose of antibiotic will cure a mild case; a $20 regimen of three antibiotics will cure a more severe case. The World Health Organization even provides the drugs free,
but India‘s health care infrastructure is not good enough to identify the afflicted and get them the
medicine they need.

So, more than 100,000 people in India are horribly disfigured by a disease that costs $3 to cure.
That is what it means to have a per capita GDP of $2,900. "

― Charles Wheelan , Naked Economics: Undressing the Dismal Science