In most cases children have a light form of new coronavirus infection COVID-19 as compared to adult patients; however, some children may develop severe forms of the disease. Children account for 1–11% of the confirmed patients, less than 1% of the patients have severe and extremely severe forms. The article describes a clinical case of a teenager with a severe course of COVID-19, characterized by the mismatch of physical data and a large degree of lung tissue damage, the development of hemorrhagic syndrome, low effectiveness of antibacterial and antiviral therapy, requiring Tocilizumab. © 2020 National Academy of Pediatric Science and Innovation. All rights reserved.