• M S Lebedkina, D S Fomina, Z Y Mutovina, U A Mаrkina, P O Bogomolov, V P Chulanov, M A Lysenko, and E I Alexeeva.
• City Clinical Hospital №52, Moscow.
• Terapevt Arkh. 2023 Aug 17; 95 (6): 494499494-499.

AimTo evaluate the efficacy and safety of a combination of virus-neutralizing monoclonal antibodies - MAB (casirivimab and imdevimab) in patients with mild to moderate COVID-19 with risk factors in real word settings.Materials And MethodsA non-interventional non-comparative observational study with primary prospective data collection included 108 patients with mild to moderate COVID-19 (mean age 61 years), who had risk factors for developing severe disease. All patients (n=108) were treated with a combination of MAB casirivimab and imdevimab intravenous single infusion 1200 mg (600 mg of each component). The efficacy and safety of MAB were assessed at 7, 14, and 28 days after infusion.ResultsEfficacy. Indications for hospitalization by day 7 from the moment of MAB administration were in 0.9% (n=1), by day 14 - in 1.9% (n=2), by day 28 - in 0.9% of patients; to stay in the intensive care units by the 7th day - in 4.6% (n=5), by the 14th day - in 0.9% (n=1), by the 28th day - in 0.9% (n=1) patients. During 28 days of follow up, the need for mechanical ventilation and extracorporeal membrane oxygenation was registered in 2/108 (1.8%) patients. There were no deaths directly related to COVID-19 in the assessed cohort of patients. Safety. By the 28th day of the follow up, no adverse effects due to MAB therapy were registered.ConclusionAn analysis of the results of a non-interventional observational study summarized in this article showed the high efficacy and safety of virus-neutralizing MAB combination (casirivimab and imdevimab) in patients with mild to moderate COVID-19 with of risk factors for severe COVID-19 in real word settings.

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