Why the Zika virus is causing alarm

Global health officials are racing to better understand the Zika virus behind a major outbreak that began in Brazil last year and has spread to many countries in the Americas. IMAGE: Rio 2016......

Zika-free warmups suggest minimal risk at Olympics

IMAGE: 2016 Rio Olympics Chief Medical Officer Joao Grangeiro speaks during a briefing on Zika virus for international media in Rio de Janeiro, Brazil, June 7, 2016. Photograph: Sergio......