Cruise ship docks in San Francisco with COVID-19 cases on board

An unknown number of passengers and crew members aboard a Princess Cruise ship in California have tested positive for COVID-19. The ship carrying the infected individuals docked in San Francisco on Sunday and plans to depart again Monday afternoon.

People aboard the Ruby Princess caught the virus while on a 15-day Panama Canal cruise. Everyone on the ship had been vaccinated before departure, Princess Cruise said. Those who tested positive for coronavirus did not spread it to others on the ship, the company said.

"They were all asymptomatic or only mildly symptomatic and were isolated and quarantined while monitored and cared for by our shipboard medical team," Princess Cruise said in a statement.