The death toll in mainland China reached 638. 3,143 new confirmed infections, taking the total to 31,161 cases, the National Health Commission said.

The virus has spread around the world, with 320 cases in 27 countries and regions outside mainland China.

There were 41 new cases among about 3 700 people quarantined in a cruise ship moored off Japan, for a total of 61 cases on board. In Hong Kong, a cruise ship with 3 600 passengers and crew was quarantined for a third day after three people who had been on board were found to be infected.