Arboviral and other illnesses in travellers returning from Brazil, June 2013 to May 2016: implications for the 2016 Olympic and Paralympic Games.

We evaluated EuroTravNet (a GeoSentinel subnetwork) data from June 2013 ă to May 2016 on 508 ill travellers returning from Brazil, to inform a ă risk analysis for Europeans visiting the 2016 Olympic and Paralympic ă Games in Brazil. Few dengue fever cases (n = 3) and no cases of ă chikungunya were documented during the 2013-15 Brazilian winter months, ă August and September, the period when the Games will be held. The main ă diagnoses were dermatological (37%), gastrointestinal (30%), febrile ă systemic illness (29%) and respiratory (11%).