Influenza (flu) is a respiratory illness cause by the influenza viruses. Influenza is contagious and symptoms often include, but are not limited to, fever, body aches, congestion, and a sore throat. People with underlying conditions and people who are pregnant are at a higher risk for serious complications from the flu. While flu viruses are present year-round, they are more prevalent in the fall and winter, with flu season running from October through May. The best way to prevent serious complications from the flu is to get vaccinated. For more information on influenza, please click here.



The Health Department tracks influenza-like-illness (ILI) in the community as an indicator of the current influenza season. Health care providers provide weekly information voluntarily on how many patients they have seen with ILI, which is defined as having a fever of 100°F (37.8°C) or greater, oral or equivalent, and a cough or sore throat.

For the latest Hamilton County ILI report please click here