For starters you must present proof of vaccination and have a negative test, medically supervised, within 72 hours of departure. Masks are required on board.
Remember when all the passengers had to line up at their assigned lifeboat and observe a life vest demo. No more. You watch a safety presentation in the comfort of your stateroom, then wander down to your lifeboat whenever.
On Wednesday every person on the ship must test negative on an in- stateroom self test. The steward checks you off.
All this to prove to our ports of call that we aren’t a plague ship.