The Centers for Disease Control and Prevention has extended indefinitely a “no sail order” for all cruise ships.

“We are working with the cruise line industry to address the health and safety of crew at sea as well as communities surrounding U.S. cruise ship points of entry,” CDC Director Robert Redfield said in a statement.

“The measures we are taking today to stop the spread of COVID-19 are necessary to protect Americans, and we will continue to provide critical public health guidance to the industry to limit the impacts of COVID-19 on its workforce throughout the remainder of this pandemic,” he added.

The CDC’s March 14 “no sail” came a day after cruise companies announced a voluntary suspension of most of their operations from US ports, according to The Hill.

Since then, at least 10 cruise liners have docked in American ports with crew members and passengers who have tested positive for the coronavirus or showed symptoms of the illness, the news outlet reported.

According to the CDC, the latest order will remain in effect until the “earliest of three situations” occurs: