Yellow fever is a dangerous mosquito-borne virus that, for hundreds of years, has caused sporadic, deadly outbreaks in the tropics of South America, Central America, and Africa. According to a new ...

Human activity continues to expand ever further into wild areas, throwing ecology out of balance. But what begins as an ...

How will COVID-19 end? Decisively, with a vaccine, or slowly, with herd immunity? Will it downshift to a recurring nuisance and a manageable condition? Or will we see an amalgam of endgames, varying ...

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 ...

An ongoing outbreak of yellow fever in Colombia is sickening and killing rare and threatened monkey species in captivity, a new study shows. Between February and May 2025, authorities reported eight ...