The yellow fever vaccine is a live vaccine, meaning it contains a weakened form of the virus. For most people, a single yellow fever vaccine can provide lifelong protection against the virus. Yellow ...

Experts are warning that yellow fever — which hasn’t had a major outbreak in the U.S. since 1905 — could make a comeback. (Photo illustration: Yahoo News; photo: Getty Image) When you think of yellow ...

If you plan on traveling abroad this summer, especially to regions within South America or Africa, it’s imperative to be aware of your risk of yellow fever, a potentially deadly flavivirus endemic to ...

A species of invasive, "aggressive" mosquitoes known for transmitting yellow fever is spreading in California, according to local health officials. Multiple counties across the state, including Contra ...

Mosquito-transmitted virus infections are on the rise and their spread is accelerating in Texas, Florida and elsewhere in the American South. With the rise of mosquito-borne illnesses, infectious ...

In a recent study published in The Lancet Global Health, researchers reviewed cross-sectional and cohort studies on the immunogenicity of yellow fever vaccines. They conducted a meta-analysis to ...

Yellow fever is a viral illness spread by mosquitoes in some parts of Africa and South America. You can take a single-dose ...