A new virus has been discovered in China. Officials in China and the World Health Organization have concluded the infection is a coronavirus.
According to scientists, the number of people already infected by the mystery virus is far greater than official figures suggest.
Meanwhile there have been nearly fifty confirmed cases of the new virus, but UK experts estimate the figure is closer to one thousand seven hundred.
While the outbreak is centred on the central Chinese city of Wuhan, there have been two cases in Thailand and one in Japan.
Also, two people are said to have died from the respiratory illness which appeared in Wuhan city in December.