Vaccines required, masks optional — The University of Delaware and the OLLI program are committed to hosting in-person programs in a safe, healthy environment. All OLLI in-person participants must provide one-time proof of full vaccination in order to attend in-person OLLI classes. In accordance with UD guidelines effective June 20, mask wearing is no longer required. Guidelines are subject to change in accordance with current UD health guidelines. For details, visit UD OLLI In-person Participation Guidelines.