Carnival Cruises will be relaxing its mask rules next month.

Three cruise ships carrying more than 100 people with flu-like symptoms are heading to Florida, the cruise lines said. Two Costa ships are headed toward Miami with about 30 crew members on board with influenza-like symptoms, Roger Frizzell, a spokesman for parent company Carnival cruises said Thursday. In total, more than 1,000 crew members are on board the ships, but no passengers. All ports along the Zaandam's route are closed to cruise ships. There are 586 crew members on board.