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COVID-19 Vaccine Side Effects Compared - Pfizer Vaccine vs Shingrix, Flu, and Placebo Local Pain 83% Redness 5% Swelling 6% Myalgia 21 % Fatigue 47% Headache 52% Chills 14% Fever 4% GI Symptoms 11% Jesse O’Shea MD, MSc @JesseOSheaMD #Vaccine #SideEffects #Pfizer #COVID19 #comparison #diagnosis #allergy