The World Health Organization says it is working closely with Japanese authorities and medical officers of the Diamond Princess to respond to coronavirus infections.
More than 450 people on board the cruise ship docked at Yokohama Port have been confirmed to have the virus.
Speaking to reporters in Geneva on Monday, a WHO expert said that infection prevention and control measures are difficult to implement on a ship environment because there are a number of factors that are very difficult to control.
She said that the WHO is focusing on its public health objective, which is to contain the virus and not to contain the people.
Meanwhile, WHO director-general Tedros Adhanom Ghebreyesus commented on the recent decline in the number of new cases reported by China. Tedros said it's too early to tell if this reported decline will continue. He added that "every scenario is still on the table."