TY - JOUR TI - Compassionate use of REGN-COV2 in the treatment of COVID-19 in a patient with impaired humoral immunity VL - 12 AV - public Y1 - 2021/11/01/ N1 - © 2021 The Author(s). Published by Elsevier Ltd on behalf of British Infection Association. This is an open access article under the CC BY-NC-ND. ID - discovery10184141 N2 - Background: The role of antibodies in coronavirus disease 2019 (COVID-19) in patients with X-linked agammaglobulinaemia (XLA) has yet to be characterised and clinical courses observed in this cohort of patients have been heterogeneous. Whilst some exhibit spontaneous recovery, others have experienced a more protracted disease length. Previous reports have described successful use of convalescent plasma, however there is a paucity of information around the use of the REGN-COV2 antibody cocktail in these patients. Case report: A patient with XLA was admitted to hospital with COVID-19 and remained persistently symptomatic with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) swab positivity despite treatment with Remdesivir and dexamethasone. Attempts at modulating the immune response with anakinra were unsuccessful. Consent for compassionate use of REGN-COV2 was obtained with administration taking place on day 87 of his illness. This was followed by a period of convalescence and SARS-CoV-2 nasopharyngeal swab negativity. As a consequence of prolonged immunosuppression, the patient developed pneumocystis pneumonia. Conclusion: This case highlights the role of antibodies in clearing SARS-CoV-2 in a hypogammaglobulinaemic host and demonstrates the consequences of prolonged immunosuppression and delayed treatment. We propose that this may be of particular significance given the capacity of SARS-CoV-2 to develop advantageous mutations in a chronically infected host. SN - 2590-1702 PB - Elsevier BV UR - https://doi.org/10.1016/j.clinpr.2021.100089 JF - Clinical Infection in Practice KW - Agammaglobulinemia KW - COVID-19 KW - REGN-COV2 KW - Remdesivir KW - SARS-CoV2 A1 - Nguyen, H A1 - Salkeld, J A1 - Agarwal, S A1 - Goodman, A ER -