(AP Photo/Felipe Dana, file photo) Aedes aegypti mosquitoes, responsible for transmitting the Zika virus, sit in a petri dish at the Fiocruz Institute in Recife, Brazil in 2016. A new University of Utah study has found that while there were no confirmed cases among athletes or visitors in Brazil during the 2016 Summer Olympics, many U.S. athletes and staff came down with other serious mosquito-borne illnesses.