The Ontario County Health Department is encouraging residents to get their flu shot soon...preferably before Halloween.
The department says the influenza virus is already circulating in Ontario County, and the vaccine can take up to two weeks to provide maximum immunity.
Health officials look to the Southern Hemisphere to predict what our flu season will be like. Australia has just been through its worst flu season in five years, meaning the U.S. may face a similar surge in flu cases this fall.