The death toll from the mysterious SARS-like virus has risen to nine in China, with the US confirming its first case.
According to the US authorities, the virus had been diagnosed in an American national who arrived in Seattle from China.
It comes after Thailand, South Korea, Japan and Taiwan also reported cases of the virus, which originated in the central Chinese city of Wuhan at the end of last year.
Meanwhile, Chinese officials have confirmed 440 cases, with more than 2,000 people kept in isolation wards following contacts with infected people.
Fifteen medical personnel are among those infected in China, with recent studies confirming that the virus can be transmitted from person-to-person.
Though the origin of the virus is yet to be identified, WHO suggested it is probably linked to Wuhan's seafood market.


Six killed in India's Mumbai as rains wreak havoc, disrupt travel
Thousands evacuated from homes in southwest France as wildfire burns
Second Russian attack on Kyiv in less than a week kills 11, wrecks apartments
Folarin Balogun to play for US after FIFA suspends red-card ban
Arab League condemns Israeli demolition of entire neighborhood in Lebanon