Liese, Bernard H.; Wilson, John; Benton, Bruce; Marr, … - Economics Research, World Bank Group - 1991
Onchocerciasis is a devastating African parasitical disease that causes severe debilitation and intense itching. By the time its victims are in their late twenties, they experience impaired vision, often blindness. Millions continued to succumb to the disease until the onchocerciasis control...