COVID-19 as many-faced Janus. On the classification of a new coronavirus infection
Authors:   Central Research Institute of Epidemiology of the Federal Service on Customers' Rights Protection and Human Well-being Surveillance, Moscow, Russian Federation, Gorelov A.V. ,   A.I.Evdokimov Moscow State University of Medicine and Dentistry, Moscow, Russian Federation, Ploskireva A.A. ,   Central Research Institute of Epidemiology of the Federal Service on Customers' Rights Protection and Human Well-being Surveillance, Moscow, Russian Federation,   N.I.Pirogov Russian National Research Medical University, Moscow, Russian Federation, Ponezheva Zh.B. ,   Central Research Institute of Epidemiology of the Federal Service on Customers' Rights Protection and Human Well-being Surveillance, Moscow, Russian Federation, Omarova Kh.G. ,   Central Research Institute of Epidemiology of the Federal Service on Customers' Rights Protection and Human Well-being Surveillance, Moscow, Russian Federation, Nikolaeva S.V. ,   Central Research Institute of Epidemiology of the Federal Service on Customers' Rights Protection and Human Well-being Surveillance, Moscow, Russian Federation, Marzhokhova A.R. ,   Kh.M.Berbekov Kabardino-Balkar State University, Nalchik, Russian Federation, Samitova E.R. ,   Z.A.Bashlyayeva Children's City Clinical Hospital of the Moscow Healthcare Department, Moscow, Russian Federation, Muzyka A.D. ,   Central Research Institute of Epidemiology of the Federal Service on Customers' Rights Protection and Human Well-being Surveillance, Moscow, Russian Federation, Lukyanov A.V. ,   Central Research Institute of Epidemiology of the Federal Service on Customers' Rights Protection and Human Well-being Surveillance, Moscow, Russian Federation, Mishkin A.A. ,   Central Research Institute of Epidemiology of the Federal Service on Customers' Rights Protection and Human Well-being Surveillance, Moscow, Russian Federation, Krivosheeva N.M. ,   Central Research Institute of Epidemiology of the Federal Service on Customers' Rights Protection and Human Well-being Surveillance, Moscow, Russian Federation, Demina I.A. ,   Central Research Institute of Epidemiology of the Federal Service on Customers' Rights Protection and Human Well-being Surveillance, Moscow, Russian Federation
Published: April 2022

The spectrum of the clinical manifestations in patients with COVID-19 varies from asymptomatic to severe forms of the disease leading to death. The most commonly affected in patients with COVID-19 system is the respiratory system, but other organ systems can also be affected by the virus. We propose a classification of the clinical forms of COVID-19, which includes: acute respiratory infection (affecting only the upper respiratory tract); pneumonia: without ARF, with ARF; anosmia/parosmia/cacosmia; cerebral form (meningitis, meningoencephalitis); gastrointestinal form, including hepatitis; oligosymptomatic form/asymptomatic form; combined forms. Sepsis, septic (infectious-toxic) shock; DIC, thrombosis and thromboembolism are proposed to be considered as complications of the underlying disease. Present classification can help clinicians to diagnose COVID-19 at an early stage, identify atypical infection forms, and assign appropriate treatment. Key words: COVID-19, classification, clinical manifestations