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0 0.25 0.5 0.75 1 1.25 1.5 1.75 2+ Regeneron (RCT) 38% 0.62 [0.29-1.33] recov. time 92 (n) 91 (n) Improvement, RR [CI] Treatment Control Regeneron (RCT) 71% 0.29 [0.17-0.48] hosp./death 18/1,355 62/1,341 Weinreich (RCT) 50% 0.50 [0.09-2.72] death 2/2,091 4/2,089 Webb 98% 0.02 [0.00-0.27] death 0/115 57/5,536 Cooper 77% 0.23 [0.03-1.65] death 1/1,148 33/8,534 Tau​2 = 0.28; I​2 = 47.7% Early treatment 68% 0.32 [0.16-0.67] 21/4,801 156/17,591 68% improvement Horby (RCT) 6% 0.94 [0.86-1.03] death 944/4,839 1,026/4,946 Improvement, RR [CI] Treatment Control McCreary 93% 0.07 [0.01-0.51] death 1/652 29/1,304 Tau​2 = 2.86; I​2 = 84.7% Late treatment 69% 0.31 [0.03-3.87] 945/5,491 1,055/6,250 69% improvement Regeneron (RCT) 94% 0.06 [0.00-1.10] symp. case 0/186 8/223 Improvement, RR [CI] Treatment Control Regeneron (DB RCT) 92% 0.08 [0.00-1.36] hosp. 0/841 6/842 Isa (DB RCT) 93% 0.07 [0.01-0.28] symp. case 3/729 13/240 Tau​2 = 0.00; I​2 = 0.0% Prophylaxis 93% 0.07 [0.03-0.21] 3/1,756 27/1,305 93% improvement All studies 77% 0.23 [0.11-0.50] 969/12,048 1,238/25,146 77% improvement 10 casirivimab/imdevimab COVID-19 studies Dec 6, 2021 Tau​2 = 0.91; I​2 = 84.7%; Z = 3.73 Effect extraction pre-specified Favors casiri/imdevimab Favors control
Database of all casirivimab/imdevimab COVID-19 studies. Submit updates/corrections.
Restrict:    All    Early    Late    Prophylaxis
Dec 1
Late McCreary et al., medRxiv, doi:10.1101/2021.11.30.21266756 (Preprint)
death, ↓93.0%, p=0.009
Association of subcutaneous or intravenous route of administration of casirivimab and imdevimab monoclonal antibodies with clinical outcomes in COVID-19
Details   Prospective study comparing subcutaneous and intravenous casirivimab/imdevimab, and comparing to a PSM matched control set, showing significantly lower mortality and hospitalization with treatment. Controls were matched with EUA-eligible ..
Nov 16
PrEPPEP Isa et al., medRxiv, doi:10.1101/2021.11.10.21265889 (Preprint)
symp. case, ↓92.6%, p=0.002
Repeat Subcutaneous Administration of REGEN-COV® in Adults is Well-Tolerated and Prevents the Occurrence of COVID-19
Details   RCT 969 patients, 729 treated with monthly subcutaneous casirivimab/imdevimab, showing significantly lower risk of COVID-19 with treatment. There were no grade 3 injection site reactions or hypersensitivity reactions. Slightly more TEAEs ..
Nov 8
PrEPPEP Regeneron Press Release (News)
hosp., ↓92.3%, p=0.03
New phase 3 analyses show that a single dose of REGEN-COV® (casirivimab and imdevimab) provides long-term protection against COVID-19
Details   Long-term results for PEP RCT NCT04452318, with 841 baseline seronegative casirivimab/imdevimab patients and 842 placebo patients, showing significantly lower cases with treatment.
Nov 2
N/A Kaleta et al., Research Square, doi:10.21203/ (Preprint) Antibody escape and global spread of SARS-CoV-2 lineage A.27
Details   Anaysis of antibody escape showing variant A.27 completely escaped neutralization with LY-COV555 and partially with REGN10987. B.1.617.2 escaped these antibodies in a similar manner, suggesting that L452R facilitates the escape. Authors n..
Oct 20
Early Bierle et al., The Journal of Infectious Diseases, doi:10.1093/infdis/jiab570 (preprint 10/20/2021) (Peer Reviewed)
ICU, ↓88.9%, p=0.16
Monoclonal Antibody Treatment of Breakthrough COVID-19 in Fully Vaccinated Individuals with High-Risk Comorbidities
Details   Retrospective 1,395 vaccinated COVID-19 cases, showing significantly lower hospitalization and oxygen supplementation with monoclonal antibody treatment, primarily casirivimab-imdevimab. Hospitalization was significantly associated with c..
Oct 8
Early Cooper et al., Open Forum Infectious Diseases, doi:10.1093/ofid/ofab512 (Peer Reviewed)
death, ↓77.5%, p=0.18
Real-world Assessment of 2,879 COVID-19 Patients Treated with Monoclonal Antibody Therapy: A Propensity Score-Matched Cohort Study
Details   Retrospective 2,879 patients and matched controls in the USA, showing significantly lower mortality and hospitalization with bamlanivimab, bamlanivimab-etesevimab, and casirivimab-imdevimab. There was significantly lower hospitalization w..
Jun 23
Early Webb et al., Open Forum Infectious Diseases, doi:10.1093/ofid/ofab331 (Peer Reviewed)
death, ↓98.3%, p=0.63
Real-World Effectiveness and Tolerability of Monoclonal Antibody Therapy for Ambulatory Patients with Early COVID-19
Details   Retrospective 115 patients treated with casirivimab/imdevimab showing lower mortality, hospital admission, and emergency department visits with treatment. Authors falsely state that "no other COVID-19 therapies for ambulatory patient..
Jun 16
Late Horby et al., medRxiv, doi:10.1101/2021.06.15.21258542 (Preprint)
death, ↓6.0%, p=0.17
Casirivimab and imdevimab in patients admitted to hospital with COVID-19 (RECOVERY): a randomised, controlled, open-label, platform trial
Details   RCT 9,785 hospitalized patients in the UK showing lower mortality with casirivimab/imdevimab, with statistical significance reached for baseline seronegative patients.
May 21
Early Weinreich et al., NEJM, doi:10.1056/NEJMoa2108163 (preprint 5/21/2021) (Peer Reviewed)
death, ↓50.0%, p=0.45
REGEN-COV Antibody Combination and Outcomes in Outpatients with Covid-19
Details   RCT 4,057 outpatients with >=1 risk factor for severe disease, showing significantly lower combined hospitalization/death, and significantly faster recovery with treatment. Median time from onset of symptoms 3 days. NCT04425629.
Apr 12
PrEPPEP O'Brien et al., NEJM, doi:10.1056/NEJMoa2109682 (Peer Reviewed)
hosp./ER, ↓88.9%, p=0.06
Subcutaneous REGEN-COV Antibody Combination to Prevent Covid-19
Details   Prophylaxis trial reporting lower hospitalization/ER and symptomatic cases, and faster recovery with 1,200mg subcutaneous casirivimab with imdevimab. The same trial has updated results available in [1]. NCT04452318.
Mar 23
Early Regeneron Press Release (Preprint)
hosp./death, ↓71.3%, p<0.0001
New phase III data shows investigational antibody cocktail casirivimab and imdevimab reduced hospitalisation or death by 70% in non-hospitalised patients with COVID-19
Details   Press release for new phase III data showing lower hospitalization/mortality, and faster symptom resolution among the subset of patients with at least one risk factor. Some variants may escape antibodies [1].
Jan 26
PrEPPEP Regeneron Press Release (Preprint)
symp. case, ↓93.6%, p=0.009
Regeneron Reports Positive Interim Data with REGEN-COV™ Antibody Cocktail used as Passive Vaccine to Prevent COVID-19
Details   Interim results of REGEN-COV prophylaxis showing 100% prevention of symptomatic infection (8/223 placebo vs. 0/186 REGEN-COV), and approximately 50% lower overall rates of infection (symptomatic and asymptomatic) (23/223 placebo vs. 10/18..
Sep 29
Early Regeneron Press Release (Preprint)
recov. time, ↓38.0%, p=0.22
Regeneron's REGN-COV2 antibody cocktail reduced viral levels and improved symptoms in non-hospitalized COVID-19 patients
Details   Analysis of the first 275 patients in a trial of the REGN-COV2 antibody cocktail showing reductions in viral load and the time to alleviate symptoms in non-hospitalized patients with COVID-19. Greatest improvements were seen with patients..
Aug 21
In Vitro Baum et al., Science, 21 Aug 2020, 369:6506, 1014-1018, doi:10.1126/science.abd0831 (Peer Reviewed) (In Vitro)
in vitro
Antibody cocktail to SARS-CoV-2 spike protein prevents rapid mutational escape seen with individual antibodies
Details   In Vitro study showing that, under pressure from individual antibodies, mutant viruses were rapidly selected that evaded the blocking function of all individual antibodies tested, including antibodies that potently bind to highly-conserve..
Aug 21
Animal Hansen et al., Science, 21 Aug 2020, 369:6506, 1010-1014, doi:10.1126/science.abd0827 (Peer Reviewed)
animal study
Studies in humanized mice and convalescent humans yield a SARS-CoV-2 antibody cocktail
Details   Study using humanized mice and blood samples from recovered COVID-19 patients to generate antibodies targeting multiple different regions of the critical receptor-binding domain (RBD) of the SARS-CoV-2 spike protein. The spike protein on ..
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