Concerns for global spread of Zika mean Rio de Janeiro Olympics must not proceed
What will prevent the outbreak is the weather in Rio. The Zika mosquito takes 3 to 4 weeks to reproduce http://www.denguevirusnet.com/life-cycle-of-aedes-aegypti.ht...
and it loves hot and wet weather.The autumn in Rio is the coldest and driest in a long time http://g1.globo.com/rio-de-janeiro/noticia/2016/03/outono-no...
When the Olympics arrive, the mosquito will be in their lowest population count.If you consider that the Olympics tourists are rich ones, that will spend most of their times in air conditioned environments, the risk is really very low.