How much risk does the Zika virus pose for Olympic visitors?
According to the Brazilian Tourism Board, approximately 350,000 – 500,000 international visitors and athletes from 207 countries are expected to travel to Rio de Janeiro, Brazil for the 2016 Olympic and Paralympic Games (Games). This travel volume represents a very small fraction – less than 0.25% – of the total estimated 2015 travel volume to Zika-affected countries.
How worried should those visitors be about the Zika virus? The Centers for Disease Control and Prevention (CDC) says visitors to the Games are expected to have a low probability of mosquito-borne Zika infections because the Games will occur during the winter season in Rio de Janeiro (August 5-21 and September 7-18, respectively) when the cooler and drier weather typically reduces mosquito populations. The CDC conducted a risk analysis to predict those countries at risk for Zika virus importation exclusively attributable to the Games.