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

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During the 2013–15 Brazilian winter months (August and September) there were no cases of Zika virus infection or chikungunya and 3 cases of dengue fever documented in travellers. During October-July 2013 -15 there were 14 cases of Zika, 15 of chikungunya and 29 cases of dengue fever.

International mass gatherings present a risk for communicable disease outbreaks and their subsequent global spread. The Olympic Games will take place mainly in Rio de Janeiro, Brazil, on 5–21 August 2016, followed by the Paralympic Games, on 7–18 September 2016. Data on mosquito-borne viral infections in travellers returning from Brazil were reviewed to provide additional information on which to base an accurate risk assessment for Europeans attending the Games. 508 ill travellers were found on 22 EuroTravNeta sites from June 2013 to May 2016.

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