Public Health Agency Of Canada
This is an excellent site by Health Canada. The site includes extensive information on various tropical diseases and their prevention. Disease outbreaks and health warnings for Canadians can be found under Advisories and International Reports.
CDC Travel Information
An excellent site for recent bulletins on international public health. Vaccine, malaria and Yellow Fever recommendations are provided based on country of destination. This site also includes information for the pregnant traveller and children.
Travel Health Online
This is an excellent site for travel health and safety information including a listing by country. This site requires registration to ensure personal, non-commercial use of the site.
WHO/OMS: World Health Organization
Lists individual diseases under Health Topics for more indepth information regarding global epidemiology.
Great resource for travel health information, including information about clinics overseas. Membership is free for a year.
Passport to Healthy Travel provides information on how to stay informed before you travel.