New study shows why vaccinating everybody against Covid-19 is essential CNNPfizer COVID-19 shot effective for people with chronic diseases- Israel study ReutersCalifornia's public universities to require COVID-19 vaccine Washington PostInoculated people being studied to determine how long protection from COVID-19 vaccines last KTLA Los AngelesDoes COVID-19 Vaccine Cause Herpes? Snopes.comView Full Coverage on Google News