STOCKHOLM, Oct. 5 (Xinhua) -- China's Tu Youyou, Irish-born William Campbell and Japan's Satoshi Omura jointly won the 2015 Nobel Prize for Physiology or Medicine, the Nobel Assembly at Sweden's Karolinska Institute announced Monday.

Tu won half of the prize "for her discoveries concerning a novel therapy against Malaria", while Campbell and Omura were jointly awarded the other half of the prize "for their discoveries concerning a novel therapy against infections caused by roundworm parasites," said the assembly.

According to the statement, Tu discovered Artemisinin, a drug that has significantly reduced the mortality rates for patients suffering from Malaria.