A South African crew member suspected of having the Omicron variant of COVID-19 is among the 17 cases of the virus detected on a cruise ship that disembarked in New Orleans over the weekend, the cruise line said on Monday. U.S. officials are closely monitoring the latest variant, which has been detected in at least a third of states, to try to ascertain its severity amid a rise in COVID-19 cases in recent weeks. Norwegian Cruise Line Holdings Ltd said the crew member on the Norwegian Breakaway vessel was in isolation for the entirety of the cruise that departed New Orleans on Nov. 28 carrying more than 3,200 individuals and made stops in Belize, Honduras, and Mexico. Louisiana health officials said all passengers were tested for COVID-19 before leaving the ship, and those who tested positive would either travel to their residence in a personal vehicle or self-isolate in accommodations …