[Opportunities to improve the prognosis of the course of COVID-19 for at-risk patients].

Aim: To evaluate the efficacy and safety of a combination of virus neutralizing monoclonal antibodies in the treatment of patients with confirmed COVID-19 and risk factors for disease progression and severe disease course.

Materials And Methods: The study was carried out in the Sokolniki temporary hospital of the Inozemtsev City Clinical Hospital. A retrospective comparative case-control study included 400 patients hospitalized for confirmed COVID-19 infection from November 01, 2022 to March 31, 2023. Patients were divided into two groups depending on the treatment given: the first control group (200) and the second group (200), where patients received a single intramuscular injection of tixagevimab + cilgavimab within the first days of hospitalization.

Results: When analyzing the concomitant pathology, C-reactive protein level and CT scans at the time of hospitalization, it was revealed that patients in the tixagevimab + cilgavimab treatment group were more severe compared to the control group. On the 2nd day of hospitalization, there was a decrease in the level of C-reactive protein in the control group by 36.2%, in the group receiving tixagevimab + cilgavimab - by 45.2%; 0.05. Standard treatment was supplemented with antibacterial therapy in 47 (23.5%) patients of the first group and in 32 (16.0%) patients of the second group, which was due to the accession of bacterial infection; 0.05. Significant differences were found in the duration of hospitalization, which averaged 8.0±0.21 bed-days in group 1 and 6.4±0.13 (0.05) bed-days in group 2. No adverse reactions to intramuscular injection of tixagevimab + cilgavimab were detected.

Conclusion: The use of a combination of neutralizing monoclonal antibodies in patients with COVID-19 reduce the average bed-day in hospitalization of patients with comorbid pathology and/or immunodeficiencies and high risk of progression of infection.