World Health Organization
-- Information resources, Disease outbreaks, and Emergencies links may be particularly useful. Also see the Declaration of Alma-Ata, 1978
Centers for Disease Control and Prevention
-- Health topics A-Z and MMWR (Morbidity and Mortality Weekly Report) may be particularly useful.
Emerging Infectious Diseases
-- CDC journal
National Institute of Allergy and Infectious Diseases (NIAID)
-- One of the National Institutes of Health
Lexis-Nexis Academic Universe
-- Search engine for news articles and more.
PubMed
-- National Library of Medicine search engine for articles in the medical research literature
Hershey-Chase blender experiment at Access Excellence, National Health Museum site for Health and Bioscience Teachers and Learners
"Code" Animations about the genetic code and how it was determined (Part of the award-winning "DNA interactive" site at The Dolan DNA Learning Center (Cold Spring Harbor Laboratory))
Central Dogma of Molecular Biology diagram at Access Excellence, National Health Museum site for Health and Bioscience Teachers and Learners
Central Dogma of Molecular Biology animation, Molecular Genetics Tutor site at University of Massachusetts, Amherst
Hershey-Chase blender experiment at Access Excellence, National Health Museum site for Health and Bioscience Teachers and Learners
Theriot Lab Movies including "Greatest Hits in Host-Pathogen Relationships"
Scientific American magazine
National Geographic magazine
Discovery (as in the Discovery Channel)
The "Bad Bug Book"
U.S. Food & Drug Administration Center for Food Safety & Applied Nutrition Foodborne Pathogenic Microorganisms and Natural Toxins Handbook
Bugs in the News!
JC Brown, Department of Molecular Biosciences Section of Microbiology, University of Kansas