In an extraordinary action, Cruise Lines International Association's oceangoing lines are voluntarily suspending sailings from and to US ports.
Singapore joined the growing list of places temporarily off-limits to cruise ships.
Passenger ships from Italy and cruise ships from any origin will not be permitted in Spanish ports starting Friday and through March 26.
People over 70 would need to provide a physician's note verifying their fitness to go on a cruise under the industry's coronavirus plan presented to US officials.
A UK researcher specialized in tourism and risk management is urging more information about actions the cruise industry is taking against coronavirus.
US officials are reviewing the cruise lines' coronavirus plan, and investors were cheered by President Trump's pledge to help the industry.
The cruise industry's plan to contain coronavirus, expected by US officials today, will be critical to avoiding potential tougher government action.