KUT Workers direct cars through a mass COVID-19 vaccination clinic at the Circuit of the Americas in February. Austin Public Health is hosting a walk-up COVID-19 vaccine clinic at the Delco Activity Center this Thursday and Friday from noon until 7:30 p.m. or until all its vaccines are administered. Vaccines will be available to all residents age 18 and older. No appointment is needed. If supplies run out, Austin Public Health said, staff will help schedule appointments for those who show up. APH currently only offers the Moderna vaccine, so any 16- and 17-year-olds who want to get vaccinated must find a provider elsewhere.