Some athletes are speaking out about their fears of the Zika virus in Brazil. One big name ,Pau Gasol, has even said he's out. A contingent of over 100 doctors, scientists, and professors have said that they should move or postpone the games. Only a few countries, to include us would have the infrastructure to pull it off.
http://www.cnn.com/2016/05/27/health/zika-virus-olympic-games-health-officials-postpone/
http://www.cnn.com/2016/05/27/health/zika-virus-olympic-games-health-officials-postpone/