According to ChinaDaily, the number of COVID-19 infections on the superyacht Diamond Princess has reached 621 as of February 19, 2020.
Those who have been in close contact with COVID-19 patients will stay on the cruise longer.
The cruise ship became the largest outbreak outside China.
Also on February 19, 500 passengers on the Diamond Princess superyacht were taken off when test results showed them negative for COVID-19. They will be quarantined for 14 days.
The entire "return" process of 500 people will be completed on February 21.
Reuters news agency said that many infected people have now been transferred to hospitals in Japan for treatment.
Medical staff in protective gear performed health checks and treatment for tourists and crew.
The group of passengers left the Diamond Princess cruise on February 19. The US had previously evacuated more than 300 citizens on two flights back home on February 17. While 6 Koreans and one Japanese (the family of one Korean) flew back to South Korea on the morning of February 19.
On February 3, a passenger was found infected with Corona virus on a British superyacht named Diamond Princess. It is known that the 8-year-old tourist tested positive for Corona virus left the ship in Hong Kong (China) on January 25 before being tested positive for Vu Han virus. At that time, 3,771 passengers and crew were "stuck" outside Yokohama port (Japan).