Resource	Web site	Cost basis	Comments
Travel counseling
Centers for Disease Control and Prevention	http://www.cdc.gov/travel	Free	Starting point for understanding travel health risk; tends to be generalized by region and conservative in advice
Exodus Software	http://www.exodus.ie	Subscription	Travel medicine software
Gideon	http://www.gideononline.com	Subscription	Online application to assist with diagnosing infectious diseases and staying abreast of epidemiologic trends, treatment, and microbiology
International SOS	http://www.internationalsos.com	Subscription	Travel insurance, security reports, and overseas clinics
Travax EnCompass	http://www.travax.com	Subscription	More specific, itinerary-based support, detailed and customizable traveler handouts, and advice on travel medicine
Tropimed	http://www.tropimed.com	Subscription	Up-to-date information on travel medicine, available on CD-ROM or via the Internet
Geopolitical information
Global Incident Map	http://www.globalincidentmap.com	Subscription	Online graphic display of terrorist-related incidents worldwide, with links to news media outlets detailing the events
U.S. State Department	http://www.travel.state.gov	Free	Resource for registering travel itineraries, locating consular information, and keeping abreast of itinerary-specific travel advisories
Other
American Committee on Clinical Tropical Medicine and Travelers' Health	http://www.astmh.org/source/clinicaldirectory	Free	List of physicians who offer clinical consultative services in tropical medicine, medical parasitology, and traveler's health
Global Gazetteer	http://www.fallingrain.com/world	Free	Altitudinal information on all world cities
Insure My Trip	http://www.insuremytrip.com	Free	Web-based resource for travelers to compare rates and benefits of various travel insurance plans
The International Society of Travel Medicine	http://www.istm.org	Free	Travel clinic directory and other resources