The Nobel Prize in Physiology or Medicine 2015 was awarded jointly to William C. Campbell and Satoshi Omura for their discoveries concerning a novel therapy against infections caused by roundworm parasites and to Youyou Tu for her discoveries concerning a novel therapy against Malaria. Omura is a professor emeritus at Kitasato University, Japan and member of AAAS.
Campbell and Omura won for developing a new drug, Avermectin. A derivative of that drug, Ivermectin, has nearly eradicated river blindness and radically reduced the incidence of filariasis, which causes the disfiguring swelling of the lymph system in the legs and lower body known as elephantiasis. Tu discovered Artemisinin, a drug that has significantly reduced the mortality rates for patients suffering from Malaria.
Congratulations to all three scientists!
Read more about this honor by going to the Nobel site here.
Read Omura's biography here.