What is the rate of incidence of yellow fever?

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There are approximately 200,000 cases of yellow fever in the world every year, mainly in tropical areas of Africa and South America; of these, about 30,000 result in death. Among U.S. residents and Europeans who traveled to South America or West Africa between 1970 and 2010, nine individuals were infected with the yellow fever virus. While eight of these individuals died, it is noteworthy that none of them were vaccinated.

It is estimated that, in a two-week period of travel, the risk of sickness due to yellow fever is 50 per 100,000 in West Africa and 5 per 100,000 in South America. The risk of death due to yellow fever is 10 per 100,000 in West Africa and 1 per 100,000 in South America. These risk estimates apply to individuals who are not vaccinated.

The greatest numbers of cases of yellow fever occur in people who live in the affected areas and are not vaccinated.

Continue Learning about Viral Infections

Viral Infections

Viral Infections

Viral infections like herpes simplex, respiratory syncytial virus (RSV), chicken pox and rotavirus are infections caused by a virus instead of a bacterium. Viral infections do not respond to antibiotics, but some specific viruses ...

like influenza A and B can be treated with certain antiviral medications. Most commonly, treatment for viral infections includes drinking lots of fluids, getting rest, eating well and letting the illness run its course.
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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.