In several Latin American nations hit hard by the Zika epidemic, the transmission of the virus appears to have peaked, with the number of infections declining in…

MIAMI -- An experimental vaccine against dengue, the world's most common mosquito-borne virus, was 100 percent effective in early trials and could speed up the pace of…

Costa Rican health officials this week reported the two latest confirmed cases of Zika virus, contracted by a man and woman who recently traveled to Nicaragua. They bring the…

See: Costa Rica confirms first two local cases of Zika virus U.S. President Barack Obama on Monday asked Congress to set aside $1.9 billion to respond to the…

It's one of the most relentless stalkers on Earth, using a tiny, needle-like probe to sip its victims' blood. It dines almost exclusively on humans and never…

PARIS – Top research institutions, funders and publishers said Wednesday they would make all scientific findings on the Zika virus assailing Latin America available speedily and free. A…

Officials from several government agencies on Monday said the current situation of Zika virus does not pose a risk for tourists traveling to Costa Rica, and that there is…

The alarming spread of the Zika virus – caused in major part by the infamous Aedes aegypti mosquito, which can also carry dengue, yellow fever and chikungunya virus…

Costa Rica and Nicaragua were added this week to the list of nearly 30 countries and territories U.S. authorities are warning pregnant women to avoid because of the presence of Zika…

Brazil is enduring an extraordinary outbreak of microcephaly, a rare birth defect that results in infants being born with abnormally small heads and brains. Since last fall,…