TY JOUR TI ORAL VIRAL LOAD OF SARS-COV-2 AND EXACERBATION OF CHRONIC PERIODONTAL DISEASE IN PATIENTS WITH NOVEL CORONAVIRUS INFECTION (COVID-19) KW novel coronavirus infection (COVID-19) KW periodontology KW chronic generalized periodontitis KW SARS-COV-2 in the oral cavity KW exacerbation JO Actual problems in dentistry AU Modina, T.N. AU Zinecker, D.T. AU Kharitonova, M.A. AU Mahdi, M.M. AU Mamaeva, E.V. AU Usmanova, I.N. PY 2021 IS 17 PB TIRAZH Publishing House