China has reported 139 new cases of a mysterious virus in two days, with the outbreak spreading from Wuhan to other major Chinese cities.
Beijing, the capital, reported two cases, while the southern tech hub of Shenzhen reported one case.
The total number of confirmed cases now exceeds 200, and three have died from the respiratory illness.
The sharp uptick in those infected comes as millions of Chinese prepare to travel for the Lunar New Year holidays.
Health officials have identified the infection, which first appeared in Wuhan in December, as being a strain of coronavirus. They say it led to an outbreak of viral pneumonia, but much about it remains unknown.
Although the outbreak is believed to have originated from a market, officials and scientists are yet to