Background.Primary immunodeficiencies (PIDs), now known as inborn errors of immunity, are a group of inherited diseases caused by defects in the genes that control the immune response.Patients with PIDs have risks of developing a severe course and/or death in COVID-19.Passive immunization with long-acting monoclonal antibodies (MABs) to SARS-CoV-2 should be considered as pre-exposure prophylaxis in patients with PIDs.Tixagevimab/cilgavimab is a combination of MABs that bind to the SARS-CoV-2 spike protein.
Aim.To evaluate the efficacy and safety of pre-exposure prophylaxis of new SARS-CoV-2 infection in PIDs with the combination of tixagevimab/cilgavimab.Materials and methods.Forty eight patients diagnosed with PIDs were included in the study.Median follow-up after drug administration was 174 days.
The total bekindtopets.com number of confirmed coronavirus infections in patients with PIDs as well as 6 months before and after read more administration of MAT were assessed.Results.In the analyzed cohort, the overall incidence of COVID-19 from pandemic onset to MABs administration was 75% (36/48), with 31% (11/36) of over-infected patients having had the infection more than once.The incidence of COVID-19 immediately 6 months before the introduction of tixagevimab/cilgavimab was 40%.All patients who had COVID-19 after pre-exposure prophylaxis had a mild infection.
The incidence of COVID-19 6 months after tixagevimab/cilgavimab administration significantly decreased compared to the incidence 6 months before administration (7 and 40%, respectively; p0.001).Conclusion.The use of tixagevimab/cilgavimab in patients with PIDs is effective as pre-exposure prophylaxis and reduces the risk of severe COVID-19.