Yellow fever is a viral illness spread by mosquitoes in some parts of Africa and South America. You can take a single-dose yellow fever vaccine, which is the best way to prevent infection with ...

Add Yahoo as a preferred source to see more of our stories on Google. Experts are warning that yellow fever — which hasn’t had a major outbreak in the U.S. since 1905 — could make a comeback. (Photo ...

When you think of yellow fever and other mosquito-borne illnesses, which are diseases that spread to people when they’re bitten by an infected mosquito, you probably assume they don’t happen often in ...