No specific inoculations are required to enter any of the Caribbean islands, unless you're arriving from a country where yellow fever is endemic, in which case you'll need a vaccination certificate. (Consult your doctor or a travel clinic for advice on specific shots.) Islands that require yellow fever inoculations include Antigua, Bahamas, Cayman Islands, Cuba, Grenada, Guadeloupe, Jamaica, St Kitts and Nevis, St Lucia, St Vincent, and Trinidad and Tobago.

It's also worth making sure that you're up to date with polio, tetanus and typhoid protection; the latter is particularly recommended for those planning to visit rural areas of Puerto Rico, Cuba, Dominica and the Dominican Republic. Inoculations against hepatitis Aand B are also strongly advised.