The alert comes as 21 people on the grand princess cruise ship off the coast of California have tested positive for the coronavirus. The warning comes as the US State Department issued an alert for travelers’particularly travelers with underlying health conditions’.

The alert from the State Department says many countries have put into place strict screening protocols to try to contain the spread of covid-19. covid-19 is the illness caused by the coronavirus.

The U.S. government has evacuated some cruise ship passengers in recent weeks.’repatriation flights should not be relied upon as an option for U.S. citizens under the potential risk of quarantine by local authorities,’ the alert States.

The grand princess cruise ship will dock at the port of Oakland, California, on Monday. Trump administration officials have said the passengers will be quarantined. Those who are ill receive medical care at area hospitals.