Health Information for Travelers to Caribbean The preventive measures (immunization, vaccination)you need to take while traveling in the Caribbean depend on the areas you visit and the length of time you stay: Antigua & Barbuda, Bahamas, Barbados, Bermuda [U.K.], Cayman Islands [U.K.], Cuba, Dominica, Dominican Republic, Grenada, Guadeloupe, Haiti, Jamaica, Martinique [France], Montserrat [U.K.], Netherlands Antilles, Puerto Rico [U.S.], St. Lucia, St. Vincent & the Grenadines, St. Kitts & Nevis, Trinidad & Tobago, Turks & Caicos, Virgin Islands [U.S. & U.K.].