ASSESSMENT OF COVID-19 CLINICAL COURSE IN PATIENTS VACCINATED WITH SPITNIK V, SARS-COV-2 S PROTEIN RBD DOMAIN VARIATION AND SERUM VIRUS NEUTRALIZING ACTIVITY СтатьяKolobukhina L.V., Burgasova O.A., Kruzhkova I.S., Bakalin V.V., Generalova L.V., Shagaev A.V., Ogarkova D.A., Nikiforova M.A., Vasina D.V., Guschin V.A., Smetanina S.V.BULLETIN OF RUSSIAN STATE MEDICAL UNIVERSITY. 2021. С. 62-70