The Nobel Prize for physiology or medicine has been split two ways for groundbreaking work on parasitic diseases, the BBC reports.
William C Campbell and Satoshi Omura developed a new drug against infections caused by roundworm parasites.
Youyou Tu shares the prize for her discovery of a therapy against malaria.
The Nobel committee said the work had changed the lives of the hundreds of millions of people affected by these diseases.
The mosquito-borne disease malaria kills more than 450,000 people each year around the world, with billions more at risk of catching the infection.
Parasitic worms affect a third of the world’s population and cause a number of illnesses, including River Blindness and Lymphatic Filariasis.