Cruise lines say it's safe to set sail. Health experts aren't convinced.

Travel and cruise industry advocates are clamoring for ships to be allowed to sail again from U.S. ports. They're calling on the Centers for Disease Control and Prevention to lift coronavirus restrictions by July, saying it would be in keeping with President Joe Biden's goal of getting the country "closer to normal" by Independence Day.

Major cruise lines halted excursions from the U.S. in March of last year, when the CDC issued a "no-sail" edict that continues to bar passenger cruise ships from leaving domestic ports.  The health agency's stance "does not reflect the industry's proven advancements and success operating in other parts of the world, nor the advent of vaccines, and unfairly treats cruises differently," Kelly Craighead, CEO of Cruise Lines International Association (CLIA), said this week in a statement. "Cruise lines should be treated the same as other travel, tourism, hospitality and entertainment sectors."