County workers say they're doing so because of the widespread flu and in some areas shortages of the flu vaccine.
There's also been an increase in flu-like-illnesses in Fresno County and across the state.
Officials said thus far the numbers they're seeing mark the season's highest level of flu activity.
Tomorrow's clinic will be held at Sierra Vista Mall in Clovis from 9 a.m. to Noon.
You can also get your flu shot at the Fresno County Department of Public Health any weekday from 8 a.m. to 4 p.m.