Effect of Sotrovimab on Hospitalization or Death Among High-risk Patients With Mild to Moderate COVID-19
Authors: Anil Gupta, Yaneicy Gonzalez-Rojas, Erick Juarez, Manuel Crespo Casal, Jaynier Moya, Diego Rodrigues Falci, Elias Sarkis, Joel Solis, Hanzhe Zheng, Nicola Scott, Andrea L. Cathcart, Sergio Parra, Jennifer E. Sager, Daren Austin, Amanda Peppercorn, Elizabeth Alexander, Wendy W. Yeh, Cynthia Brinson, Melissa Aldinger, Adrienne E. Shapiro, Almena Free, Kimball Johnson, Edward Cordasco, Raymond Little, Ali Bajwa, Ankur Doshi, Augusto Focil, Rubaba (Rubie) Hussain, Greg Bostick, Guillermo Somodevilla, Hasan Ali, John Kowalczyk, Shilpi Mittal, Jorge Caso, Marcy Goisse, Ladynez Espinal, Luis Zepeda, Thinh Nguyen, Luis Martinez, German Alvarez, Ronald Pucillo, Michael Seep, Naval Parikh, Victor Escobar, Armando Curra, Vinicius Dal Maso, John O'Mahony, Eduardo Ramacciotti, Jorge Diaz, Kleber Luz, Peter Ruane, Bharat Mochlera, Juan Roldan Sanchez, Luis Hernandez, Alfredo Fernandez, Glenn Leavitt, Masoud Azizad, Haider Afzal, Adil Fatakia, Silvia Narejos Perez, Claudio Marcel Stadnik, Linda Gorgos, Yessica Sachdeva, Patricia Segura, Carlos Quandros, Russell Perry, Lawrence Sher
Journal: JAMA (2022)

Older patients and those with comorbidities who are infected with SARS-CoV-2 may be at increased risk of hospitalization and death. Sotrovimab is a neutralizing antibody for the treatment of high-risk patients to prevent COVID-19 progression.To evaluate the efficacy and adverse events of sotrovimab in preventing progression of mild to moderate COVID-19 to severe disease.Randomized clinical trial including 1057 nonhospitalized patients with symptomatic, mild to moderate COVID-19 and at least 1 risk factor for progression conducted at 57 sites in Brazil, Canada, Peru, Spain, and the US from August 27, 2020, through March 11, 2021; follow-up data were collected through April 8, 2021.Patients were randomized (1:1) to an intravenous infusion with 500 mg of sotrovimab (n = 528) or placebo (n = 529).The primary outcome was the proportion of patients with COVID-19 progression through day 29 (all-cause hospitalization lasting >24 hours for acute illness management or death); 5 secondary outcomes were tested in hierarchal order, including a composite of all-cause emergency department (ED) visit, hospitalization of any duration for acute illness management, or death through day 29 and progression to severe or critical respiratory COVID-19 requiring supplemental oxygen or mechanical ventilation.Enrollment was stopped early for efficacy at the prespecified interim analysis. Among 1057 patients randomized (median age, 53 years [IQR, 42-62], 20% were ≥65 years of age, and 65% Latinx), the median duration of follow-up was 103 days for sotrovimab and 102 days for placebo. All-cause hospitalization lasting longer than 24 hours or death was significantly reduced with sotrovimab (6/528 [1%]) vs placebo (30/529 [6%]) (adjusted relative risk [RR], 0.21 [95% CI, 0.09 to 0.50]; absolute difference, -4.53% [95% CI, -6.70% to -2.37%]; P < .001). Four of the 5 secondary outcomes were statistically significant in favor of sotrovimab, including reduced ED visit, hospitalization, or death (13/528 [2%] for sotrovimab vs 39/529 [7%] for placebo; adjusted RR, 0.34 [95% CI, 0.19 to 0.63]; absolute difference, -4.91% [95% CI, -7.50% to -2.32%]; P < .001) and progression to severe or critical respiratory COVID-19 (7/528 [1%] for sotrovimab vs 28/529 [5%] for placebo; adjusted RR, 0.26 [95% CI, 0.12 to 0.59]; absolute difference, -3.97% [95% CI, -6.11% to -1.82%]; P = .002). Adverse events were infrequent and similar between treatment groups (22% for sotrovimab vs 23% for placebo); the most common events were diarrhea with sotrovimab (n = 8; 2%) and COVID-19 pneumonia with placebo (n = 22; 4%).Among nonhospitalized patients with mild to moderate COVID-19 and at risk of disease progression, a single intravenous dose of sotrovimab, compared with placebo, significantly reduced the risk of a composite end point of all-cause hospitalization or death through day 29. The findings support sotrovimab as a treatment option for nonhospitalized, high-risk patients with mild to moderate COVID-19, although efficacy against SARS-CoV-2 variants that have emerged since the study was completed is unknown.ClinicalTrials.gov Identifier: NCT04545060.