NEW YORK (WABC) -- After the Zika virus epidemic that spread through the America's last year, U.S. officials are keeping a close eye on another mosquito-borne virus. An outbreak of yellow fever in ...

A deadly and growing yellow fever outbreak in Brazil has killed at least four international visitors, and US health officials on Friday warned travelers to get vaccinated or stay away. Yellow fever is ...

Every year, there are as many 400 million cases of dengue fever globally, according to the World Health Organization. The Americas see the majority of these cases, and Brazil has among the highest ...

Fears of spreading yellow fever are behind the illegal killing of scores of monkeys in Rio de Janeiro, complicating efforts to fight the virus, authorities say. Just this year, 238 monkeys have been ...