Last update: 7:19 am 29/11/2021: This page will document the case for natural immunity vs. artificial mRNA serum Articles from: https://www.nejm.org/ Study of the naturally immune had a 0.00369% chance of reinfection and zero hospitalisations with no indication of waning protection Article Link Date: 24/11/2021 Population location: Qatar Worldometer Study Group: 353,326 non-vaccinated persons who contracted SARS-CoV-2 virus and recovered naturally Number re-infected = 1,304 Median reinfection period: 277 days Statistics: 0.00369 % chance of reinfection after achieving natural immunity Hospitalisation and fatalities on reinfection: 0 (nil) Conclusion: Natural immunity is effective Laith J. Abu-Raddad, Ph.D. Hiam Chemaitelly, M.Sc. Weill Cornell Medicine–Qatar, Doha, Qatar lja2002@qatar-med.cornell.edu Roberto Bertollini, M.D., M.P.H. Ministry of Public Health, Doha, Qatar for the National Study Group for COVID-19 Epidemiology