The Caribbean islands continue to open on a limited basis to international tourism with stringent protocols designed to protect the health of their visitors and residents against the virus. Due to the high number of infections in the United States, not all the islands receive American visitors, while others have not even chosen to reopen.
St. Maarten is one of the islands that is once again open to the world, with its French side is closed to the United States, as are the islands of St. Kitts and Nevis, Martinique, Monserrat, Guadeloupe, Curacao, the Cayman Islands, British Virgin Islands and Bonaire. The rest receive American visitors through different protocols that can be seen in greater detail here.
Source: Travel Weekly