Save Your Spot for the Dec. 3 COVID-19 Booster Clinic November 23, 2021 matthew.young1. On December 3, COVID-19 booster shots are being offered to current WSU Pullman students.. Appointments are required. Appointments are available Friday, December 3 from 10 a.m.-1 p.m. Schedule an appointment. Cougar Health Services is now offering COVID-19 vaccines to current WSU Pullman students..