(Fall River) The Columbia County Health Department will be hosting a free walk-in COVID vaccine clinic this Saturday. County health officials say the clinic will be for a one-and-done Johnson and Johnson shot. The J and J vaccine is only offered to those 18 and older. Appointments are not necessary to receive the vaccine but people can schedule ahead of time. Those interested in going must stay on site for a 15-minute observation period after receiving the vaccine. Health officials also ask those in attendance to practice social distancing and wear a mask. The clinic will be at the Fall River Chamber of Commerce Arts and Crafts Farmers Market located at the Savannah Oaks Community Center on Highway 16. It will be held from 8am to 3pm. To schedule a vaccine shot visit vaccinate.wi.gov.