• N. Engl. J. Med. · Oct 2021

    Randomized Controlled Trial

    Bamlanivimab plus Etesevimab in Mild or Moderate Covid-19.

    • Michael Dougan, Ajay Nirula, Masoud Azizad, Bharat Mocherla, Robert L Gottlieb, Peter Chen, Corey Hebert, Russell Perry, Joseph Boscia, Barry Heller, Jason Morris, Chad Crystal, Awawu Igbinadolor, Gregory Huhn, Jose Cardona, Imad Shawa, Princy Kumar, Andrew C Adams, Jacob Van Naarden, Kenneth L Custer, Michael Durante, Gerard Oakley, Andrew E Schade, Timothy R Holzer, Philip J Ebert, Richard E Higgs, Nicole L Kallewaard, Janelle Sabo, Dipak R Patel, Matan C Dabora, Paul Klekotka, Lei Shen, Daniel M Skovronsky, and BLAZE-1 Investigators.
    • From Massachusetts General Hospital and Harvard Medical School, Boston (M. Dougan); Eli Lilly (A.N., A.C.A., J.V.N., K.L.C., M. Durante, G.O., A.E.S., T.R.H., P.J.E., R.E.H., N.L.K., J.S., D.R.P., M.C.D., P. Klekotka, L.S., D.M.S.), and Franciscan Health (I.S.) - both in Indianapolis; Valley Clinical Trials-Northridge, Northridge (M.A.), the Department of Medicine, Women's Guild Lung Institute, Cedars-Sinai Medical Center, Los Angeles (P.C.), and Long Beach Clinical Trials, Long Beach (B.H.) - all in California; the Las Vegas Medical Research Center, Las Vegas (B.M.); Baylor University Medical Center and Baylor Scott and White Research Institute, Dallas (R.L.G.), and Gadolin Research, Beaumont (R.P.) - both in Texas; NOLA Research Works, New Orleans (C.H.), and Clinical Trials of Southwest Louisiana, Lake Charles (J.M.) - both in Louisiana; Vitalink Research, Union, SC (J.B.); Eastside Research Associates, Redmond, WA (C.C.); Monroe Biomedical Research, Monroe, NC (A.I.); Cook County Health, Chicago (G.H.); Indago Research and Health Center, Hialeah, FL (J.C.); and Georgetown University, Washington, DC (P. Kumar).
    • N. Engl. J. Med. 2021 Oct 7; 385 (15): 1382-1392.

    BackgroundPatients with underlying medical conditions are at increased risk for severe coronavirus disease 2019 (Covid-19). Whereas vaccine-derived immunity develops over time, neutralizing monoclonal-antibody treatment provides immediate, passive immunity and may limit disease progression and complications.MethodsIn this phase 3 trial, we randomly assigned, in a 1:1 ratio, a cohort of ambulatory patients with mild or moderate Covid-19 who were at high risk for progression to severe disease to receive a single intravenous infusion of either a neutralizing monoclonal-antibody combination agent (2800 mg of bamlanivimab and 2800 mg of etesevimab, administered together) or placebo within 3 days after a laboratory diagnosis of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. The primary outcome was the overall clinical status of the patients, defined as Covid-19-related hospitalization or death from any cause by day 29.ResultsA total of 1035 patients underwent randomization and received an infusion of bamlanivimab-etesevimab or placebo. The mean (±SD) age of the patients was 53.8±16.8 years, and 52.0% were adolescent girls or women. By day 29, a total of 11 of 518 patients (2.1%) in the bamlanivimab-etesevimab group had a Covid-19-related hospitalization or death from any cause, as compared with 36 of 517 patients (7.0%) in the placebo group (absolute risk difference, -4.8 percentage points; 95% confidence interval [CI], -7.4 to -2.3; relative risk difference, 70%; P<0.001). No deaths occurred in the bamlanivimab-etesevimab group; in the placebo group, 10 deaths occurred, 9 of which were designated by the trial investigators as Covid-19-related. At day 7, a greater reduction from baseline in the log viral load was observed among patients who received bamlanivimab plus etesevimab than among those who received placebo (difference from placebo in the change from baseline, -1.20; 95% CI, -1.46 to -0.94; P<0.001).ConclusionsAmong high-risk ambulatory patients, bamlanivimab plus etesevimab led to a lower incidence of Covid-19-related hospitalization and death than did placebo and accelerated the decline in the SARS-CoV-2 viral load. (Funded by Eli Lilly; BLAZE-1 ClinicalTrials.gov number, NCT04427501.).Copyright © 2021 Massachusetts Medical Society.

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