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Background. Since the onset of the coronavirus disease 2019 (COVID-19) epidemic until January 1, 2024, more than 5.5 million confirmed cases of COVID-19 have been detected in Ukraine according to official data, approximately 6 % of them among children under 18 years old. Aim: to improve the management of newborns based on studies of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) infection with different course. Materials and methods. Eleven newborns (7 boys and 4 girls) diagnosed with SARS-CoV-2 confirmed by polymerase chain reaction were observed. Disease progression, results of laboratory and instrumental studies were analyzed. Results. An analysis of clinical data and the results of laboratory and instrumental investigations are presented, as well as treatment outcomes in newborns with confirmed COVID-19. It was found that in all cases, children were infected from mothers with SARS-CoV-2. The frequency of clinical symptoms is provided, revealing discrepancies between respiratory symptoms and changes identified on lung ultrasound. Most children exhibited anemia, elevated D-dimer levels in the blood, yet experienced a mild course of the disease. The average duration of illness prior to hospitalization was 3.70 ± 1.48 days, with a hospital stay of 4.01 ± 1.22 days. An exception was in case of patient N., characterized by a severe condition necessitating prolonged oxygen therapy, mechanical ventilation, and administration of remdesivir. This particular case is detailed in the article. Conclusions. In most infants under one month of age observed in this study, the course of ­COVID-19 caused by SARS-CoV-2 was characterized by symptoms such as lethargy, hyperthermia, nasal congestion, diarrhea, and changes detected only through laboratory and instrumental stu­dies: anemia, abnormalities in the coagulation system, and increased lung parenchymal density. Ho­wever, the disease course in infants of this age can also be very severe, with lung parenchymal involvement, pneumonia, COVID-19-associated coagulopathy, complicated by generalized bacterial infection, as presented in the clinical case.