Yi Guan is a Chinese virologist who , in 2014 , was ranked as 11th in the world by Thomson Reuters ( now known as Clarivate Analytics ) among global researchers in the field of microbiology . His research on the viral respiratory disease SARS allowed the Chinese government to successfully avert the 2004 outbreak of this disease . He is the current Director ( China affairs ) of the State Key Laboratory for Emerging Infectious Diseases University of Hong Kong . In early 2017 , Guan warned that the H7N9 influenza virus " poses the greatest threat to humanity than any other in the past 100 years . " Guan received his MD degree from the Medical College of Nanchang University ( also known as Jiangxi Medical College ) , his advanced medical degree from Peking Union Medical College ( also known as Beijing Union Medical College ) , and his PhD from the University of Hong Kong
H7N9 influenza virus
Influenza A virus subtype H7N9
Yi Guan