Sylvia M. Burwell (left), secretary of Health and Human Services of US; Liu Yandong (center), vice premier of China; and Li Bin (right), minister of National Health and Family Planning Commission of China at the signing of Memorandum of Understanding for the Collaborative Program on Emerging and Re-emerging Infectious Diseases between The Department of Health and Human Services of the United States of America and The National Health and Family Planning Commission of China. DONG LESHUO/CHINA DAILY