For citations:
Popova A.Yu., Ezhlova E.B., Mel’nikova A.A., Noskov A.K., Kovalev E.V., Karpushchenko G.V., Lyalina L.V., Smirnov V.S., Chemisova O.S., Trishina A.V., Bereznyak E.A., Volovikova S.V., Stenina S.I., Yanovich E.G., Meloyan M.G., Asmolova N.Yu., Usova A.A., Slis’ S.S., Totolyan A.A. Assessment of Population Immunity to SARS-CoV-2 Virus in the Rostov Region. Problems of Particularly Dangerous Infections. 2020;(4):117-124. (In Russ.) https://doi.org/10.21055/0370-1069-2020-4-117-124