Nil risk for Zika virus according to the organizers of Rio

Numbers of Zika cases in Rio de Janeiro have dropped sharply in recent weeks and will fall to almost nothing during the dry winter months of the Olympic and Paralympic Games, Rio 2016 organisers and medical authorities said. Citing the results of computer modelling published by the Cambridge University Press in April, Games organisers estimated that only one or two tourists would contract Zika during the Rio 2016 Olympic Games, which start on 5 August.

No cases of Zika were reported in the 44 test events for the Olympic and Paralympic Games, in which about 7,000 athletes, 8,000 volunteers and 2,000 staff participated. The test event programme began in August 2014 and was completed in May this year. Many of the events took place in Rio's wetter summer months, when mosquitoes are more prevalent.