For citations:
Kryukova N.O., Rakunova E.B., Kostinov M.P., Baranova I.A., Svitich O.A. Secretory immunoglobulin A of the respiratory system and COVID-19. PULMONOLOGIYA. 2021;31(6):792-798. (In Russ.) https://doi.org/10.18093/0869-0189-2021-31-6-792-798