WHO risk assessment
There is limited information to determine the overall risk of this reported cluster of pneumonia of unknown etiology. The reported link to a wholesale fish and live animal market could indicate an exposure link to animals. The symptoms reported among the patients are common to several respiratory diseases, and pneumonia is common in the winter season; however, the occurrence of 44 cases of pneumonia requiring hospitalization clustered in space and time should be handled prudently.
Wuhan city, with a population of 19 million, is the capital city of Hubei province, with a population of 58 million people. WHO has requested further information on the laboratory tests performed and the differential diagnoses considered.