EDINBURG –Three cases of West Nile Virus have been confirmed in Hidalgo County, Health and Human Services Director Eduardo Olivarez said Monday. Two of the cases emanate from Mercedes; one of the cases is from Weslaco. The virus is the leading mosquito-borne disease in the United States, according to the Center of Disease Control and Prevention. People typically get the disease after being bitten by infected mosquitoes. And while there are no vaccines to prevent the disease or medicines to treat it, most people who get infected never even show symptoms of the disease, according to the CDC. Only one in five ...