Yellow Fever (WHO Fact Sheet No. 100)
This official WHO fact sheet offers basic information on the disease. Yellow fever is a viral disease that has caused large epidemics in the Americas. It can be recognized from historic texts stretching back 400 years. Infection causes a wide spectrum of disease, from mild symptoms to severe illness and death. The "yellow" in the name is explained by the jaundice that affects some patients. Although an effective vaccine has been available for 60 years, the number of people infected over the last two decades has increased and has become urbanized, becoming once again a serious public-health issue again.   (20/Oct/2006)
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