TY JOUR TI THE STATE OF HYGIENE AND CLINICAL MANIFESTATIONS OF DISEASES OF THE ORAL MUCOSA IN PATIENTS WITH COVID-19 KW COVID-19 KW coronavirus infection KW oral hygiene KW hygiene products KW oral mucosa JO Actual problems in dentistry AU Dem'yanenko, S.A. AU Duryagina, L.K. AU Degtyareva, L.A. AU Prijma, N.V. AU Dubrovina-Parus, T.A. AU Dorofeeva, O.V. AU Tofan, Y.V. PY 2022 IS 18 PB TIRAZH Publishing House