Immunize Canada
   A public resource discussing the benefits of vaccines and vaccinations. Information on diseases, vaccines, immunization schedules, travel and health.
   http://www.immunizecanada.com/

MCW HealthLink: Travel Medicine
   Details of major infectious diseases and information about in which countries they are found, plus recommended vaccines and precautionary advice.
   http://healthlink.mcw.edu/travel-medicine/index.html

Massachusetts Department of Public Health
   Division of Epidemiology and Immunization, Bureau of Communicable Disease Control's extensive list of recommendations and information for immunizations.
   http://www.mass.gov/dph/cdc/epiimm2.htm

Passport Health Travel Vaccines
   A US network of independently owned and operated Travel Health and Immunization Clinics.
   http://passporthealthtexas.com

TravelVacs.ca
   Designed to assist Canadian travelers in determining what precautions and vaccinations if any, may be considered when traveling overseas. It will also provide the location of your nearest travel clinic. In French and English. From Aventis Pasteur Limited.
   http://www.travelvacs.ca

Tropical Medical Bureau
   Vaccination information for the international traveller, from an Ireland tropical medicine clinic.
   http://tmb.exodus.ie/exodus/