» 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 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://passporthealthusa.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/

» eMedicine: Travel Medicine and Vaccination    Overview and introduction to the field.    http://www.emedicine.com/emerg/topic838.htm