Concerns over yellow fever arise FOX 35 Orlando Health Published May 7, 2018 10:37 AM EDT Share Copy Link Email Facebook Twitter LinkedIn Reddit Published May 7, 2018 10:37 AM EDT ORLANDO, Fla. (FOX 35 WOFL) - South Florida health officials are sharing new concerns about mosquitoes. According to the Sun-Sentinel, they are worried about yellow fever. There has not been an outbreak of it in the states in more than 100 years.