Human to human transmission has been confirmed by China’s national health commission. As of 27 January, the Chinese authorities had acknowledged more than 2,700 cases and 56 deaths. In the past week, the number of confirmed infections has more than tripled and cases have been found in 13 provinces, as well as the municipalities of Beijing, Shanghai, Chongqing and Tianjin.
The virus has also been confirmed outside China, in Hong Kong, Macau, Japan, Nepal, Singapore, South Korea, Taiwan, Thailand, the US, and Vietnam. There have not been any confirmed cases in the UK at present, with the 14 people tested for the virus all proving negative.
The actual number to have contracted the virus could be far higher as people with mild symptoms may not have been detected. Modelling by WHO experts at Imperial College London suggests there could be as many as 100,000 cases, with uncertainty putting the margins between 30,000 and 200,000.