File photo taken on Nov. 15, 2011 shows Chinese pharmacologist Tu Youyou attending a meeting held by the China Academy of Chinese Medical Sciences in Beijing, capital of China. 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 on Monday. Tu won half of the prize for her discoveries concerning a novel therapy against malaria.(Xinhua/Jin Liwang)

File photo taken on Nov. 15, 2011 shows Chinese pharmacologist Tu Youyou presented with the "outstanding contribution" award at a meeting held by the China Academy of Chinese Medical Sciences in Beijing, capital of China. At the meeting a prize of one million yuan (157,500 U.S. dollars) was awarded to 81-year-old pharmacologist Tu Youyou and her team for their discovery of what has become a standard treatment for malaria. 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 on Monday. Tu won half of the prize for her discoveries concerning a novel therapy against malaria.(Xinhua/Jin Liwang)

File photo taken on Nov. 15, 2011 shows Chinese pharmacologist Tu Youyou speaking to media after returning from the United States to receive the Lasker Award, a prestigious U.S. medical prize, in Beijing, capital of China. 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 on Monday. Tu won half of the prize for her discoveries concerning a novel therapy against malaria.(Xinhua/Jin Liwang)