Johns Hopkins Study: 99% Of All Covid Prior Infections Resulted In ‘Natural Immunity’ That Lasted At Least 650 Days | SGT Report Posted on February 7, 2022February 7, 2022 Share This https://www.sgtreport.com/2022/02/johns-hopkins-study-99-of-all-covid-prior-infections-resulted-in-natural-immunity-that-lasted-at-least-650-days/