Vaccines required, masks encouraged — 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. Masks wearing is optional but strongly encouraged. Guidelines are subject to change in accordance with current UD health guidelines. For details, visit UD OLLI In-person Participation Guidelines.