Royal Caribbean Cruises and Norwegian Cruise Line Holdings have joined forces in developing improved cruise health and safety standards amid the coronavirus pandemic.

The two Miami-based cruise majors with 80 ships have formed a Healthy Sail Panel focused on devising recommendations to help the sector prevent the spread of the virus.

The group — formed in June and led by former Utah governor Mike Leavitt and physician Dr Scott Gottlieb as co-chairmen — will offer initial recommendations by the end of August as an "open-source" collaborative.