CDC is closely monitoring a reported cluster of pneumonia of unknown etiology (PUE) with possible epidemiologic links to a large wholesale fish and live animal market in Wuhan City, Hubei Province, China. An outbreak investigation by local officials is ongoing in China and being monitored by the World Health Organization (WHO). Currently, there are no known U.S. cases nor have cases been reported in countries other than China. CDC suggests that healthcare providers ask patients with severe respiratory disease about travel history to Wuhan City, a major transportation hub about 700 miles south of Beijing. For additional information, see the WHO emergency preparedness alert and the CDC travel notice.