FORT LAUDERDALE, Fla.—The first cruise ship to leave a U.S. port since the coronavirus pandemic brought the industry to a 15-month standstill sailed away on Saturday with nearly all vaccinated passengers on board. Celebrity Edge departed Fort Lauderdale, Florida, at 6 p.m. with the number of passengers limited to about 40 percent capacity, and with nearly all 1,100 passengers vaccinated against COVID-19. Celebrity Cruises, one of Royal Caribbean Cruise’s brands, says 99 percent of the passengers are vaccinated, well over the 95 percent requirement imposed by the Centers for Disease Control and Prevention. A giant greeting was projected on a wall of one of the port buildings: “Someday is here. Welcome back.” Passengers arrived with matching T-shirts that read phrases such as “straight outta vaccination” and “vaccinated and ready to cruise.” “Words can’t describe how excited we are to be a part of this historic sailing today,” said Elizabeth Rosner, …