PVPUSD Vaccine Clinic - 3rd Pfizer Dose Booster PVPUSD Vaccine Clinic will offer the 3rd dose Pfizer booster for immunocompromised patients. When registering, select 2nd dose and complete your registration. Click on the link, for more information. https://www.pvpusd.net/apps/pages/index.jsp?uREC_ID=367325&type=d&pREC_ID=2219367