Be Concerned About the Guy Across the Aisle

While a lot of vaccinated divers are off for diving excursions, the bad news, says Christopher Elliot, a diver, and publisher of Elliott Confidential, a newsletter for travelers, is that "more than half of adult U.S. travelers (58 percent) remain unvaccinated.

"So where are these unvaxxed travelers going? Internationally, the most common destinations are Mexico (37 percent), Greece (19 percent), Dominican Republic (12 percent), Bahamas (11 percent), Aruba (13 percent), and Costa Rica (8 percent)."

Countries with warm weather and outdoor activity are attracting tourists, so exercise special caution on the plane, at airports, and in passenger vans.