(Portage) The Columbia County Health Department will be hosting a free walk-in COVID vaccine clinic Saturday. County health officials say the clinic will be for the 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 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 Taste of Portage at 112 East Edgewater Street between 11am and 4pm Saturday (August 28th). Information about scheduling a vaccine shot is available at DailyDodge.com.