Official advice from American and international sources. Simply follow the links provided to visit these sites.

CDC Travel Information U.S. Centers for Disease Control. Geographical information on disease outbreaks and health recommendations. 

World Health Organization  Travel information and health advice for international travelers from the World Health Organization, with links to information on emerging and communicable diseases.

BBC - Travel Health Information and advice compiled by the BBC's health team.

The Society for Accessible Travel and Hospitality based in the USA provides links and information for the traveller with existing medical problems.

Travel Clinics Directory of The American Society of Tropical Medicine and Hygiene

Travel Clinics Directory of The International Society of Travel Medicine