Health officers enter a hospital where a Chinese man is quarantined, the first confirmed case of the new H1N1 strain of flu in mainland China, in Chengdu, Sichuan province May 10, 2009. Mainland China on Monday reported its first confirmed case of the new H1N1 strain of flu, formerly known as swine flu, a man in southwestern Sichuan province who had flown home from the United States. Picture taken May 10, 2009. REUTERS/Stringer (CHINA HEALTH) CHINA OUT. NO COMMERCIAL OR EDITORIAL SALES IN CHINA
REUTERS/STRINGER SHANGHAI