Mamas Health -
 Learn about Yellow Fever, what causes it, statistics and how to prevent it.
http://www.mamashealth.com/yellow.asp

MDTravel Health - Yellow Fever -
 Factsheet about the disease and vaccine, focusing on travelers.
http://www.mdtravelhealth.com/infectious/yellow_fever.html

MedlinePlus Medical Encyclopedia: Yellow Fever -
 Includes cause, risk factors, symptoms, diagnosis, treatment, complications, prognosis, and prevention.
http://www.nlm.nih.gov/medlineplus/

NHS Direct Online Health Encyclopaedia -
 Encyclopaedia article about the tropical disease yellow fever.
http://www.nhsdirect.nhs.uk/

The Panama Puzzle -
 Online virology tutorial. It's June 25th, 1900. Walter Reed needs your help to put an end to "yellow jack," a disease causing his men to drop like flies.
http://www.tulane.edu/~dmsander/Tutorials/Panama/Panama.html

The Political Graveyard -
 Politicians who died of yellow fever.
http://politicalgraveyard.com/death/yellow-fever.html

Update on Yellow Fever in the Americas -
 Disease information from the Pan American Health Organization.
http://www.paho.org/English/SHA/be_v21n2-yellowfever.htm

WHO: Yellow Fever -
 Features disease and vaccine information, factsheets, news stories, articles, information for travelers, and international programs.
http://www.who.int/csr/disease/yellowfev/en/