Brazil has been hit hard by the mosquito-borne virus, which has been linked to severe birth defects in infants, raising concerns about the outbreak's potential impact on the Olympics in August.
The International Olympic Committee sent a note today to all national Olympic committees outlining the latest medical advice concerning Zika, the latest problem for a country already dealing with a severe economic crisis and a sprawling corruption scandal.
The IOC's medical commission says "we remain confident that there will be a safe environment for successful and enjoyable Olympic Games in Rio de Janeiro.