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 ArticleKolobukhina 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