The door to Tu Youyou’s 20th-floor apartment in Beijing was opened by her husband, Li Tingzhao. Mr. Li, a metallurgy engineer, has been serving as Dr. Tu’s protector from the clamor of phone calls and well-wishers since the announcement this week that she had become the first citizen of the People’s Republic of China to beawarded a Nobel Prize in the sciences. The honor for her discovery of artemisinin, a drug that is now part of standard antimalarial regimens, is being widely celebrated in China as a vindication of traditional Chinese medicine. Read more