The preventive measures you need to take while traveling in the Caribbean depend on the areas you visit and the length of time you stay. You should observe the precautions listed in this document in most areas of this region. Travelers' diarrhea , the number one illness in travelers, can be caused by viruses, bacteria, or parasites, which can contaminate food or water. Make sure your food and drinking water are safe.
Malaria is a preventable infection that can be fatal if left untreated.
Travelers to all areas of Haiti are at risk for malaria. Travelers to rural areas of the Dominican Republic, especially in the provinces bordering Haiti, are at risk for malaria. No risk in resorts in the Dominican Republic. The other Caribbean islands listed are not malaria-risk areas. Travelers to Haiti and rural Dominican Republic should take chloroquine to prevent malaria.