A Miami-Dade County mosquito control worker sprays around a home in August 2016 in the Wynwood area of Miami. A University of Florida study recently identified the first known human case of the mosquito-borne Keystone virus.

A Miami-Dade County mosquito control worker sprays around a home in August 2016 in the Wynwood area of Miami. A University of Florida study recently identified the first known human case of the mosquito-borne Keystone virus.