Abstract
Background
: Solid organ transplant recipients (SOTR) are at high-risk for severe infection from severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Anti-spike monoclonal antibodies are currently utilized under emergency use authorization to prevent hospitalization in high-risk individuals with coronavirus disease-2019 (COVID-19), including SOTRs. However, clinical data for bebtelovimab, the sole currently available anti-spike monoclonal antibody for COVID-19, is limited.
Methods
: We conducted a retrospective cohort study of adult SOTRs diagnosed with mild-to-moderate COVID-19 from January 2022 through May 2022 who received either bebtelovimab or sotrovimab. The primary outcome was COVID-19-related hospitalization within 30 days of COVID-19 diagnosis. Data were analyzed with Fisher's exact test.
Results
: Among 361 SOTRs, 92 (25.5%) received bebtelovimab and 269 (74.5%) received sotrovimab. The most common organ transplant was kidney (42.4%). SOTRs who received bebtelovimab had a higher proportion who had received a booster SARS-CoV-2 vaccine dose and had received their last vaccination dose more recently. Eleven (3.0%) SOTRs were hospitalized, and rates of hospitalization were similar between monoclonal antibody groups (3.3% versus 3.0%; p>0.99). Three patients required admission to an intensive care unit, all who received sotrovimab. Four (1.1%) patients died within 30 days of COVID-19 diagnosis, two from each group.
Conclusions
: SOTRs with mild-to-moderate COVID-19 who received bebtelovimab had similar rates of COVID-19-related hospitalization as those who received sotrovimab. While differences in vaccination rates and viral subvariants could act as confounders, bebtelovimab appears to be of similar effectiveness as sotrovimab.
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