The World Health Organization endorsed the RTS,S/AS01 malaria vaccine for children, the first against the mosquito-borne disease that kills more than 400,000 a year.
A new report provides new information about how the Zika virus acts to infect a fetus and indicates that Zika may remain in the blood longer than thought.
Costa Rica's ambassador to the U.S. touted this week his country's success in keeping the mosquito-borne Zika virus in check, but warned of vulnerabilities, including migration and the coming rainy season.
