Vaccine Info

Bebtelovimab (LY-CoV1404) Monoclonal Antibody

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Last reviewed
June 23, 2022

Bebtelovimab Monoclonal Antibody

Eli Lilly and Company Bebtelovimab (LY-CoV1404, LY3853113) is a potent, neutralizing SARS-CoV-2 spike glycoprotein receptor-binding domain (RBD)-specific antibody identified from a convalescent patient sample. This anti-SARS-CoV-2 monoclonal antibody (mAb) is reported to maintain binding and neutralizing activity across reported coronavirus variants of concern (VOC), including Omicron and subvariants.

Bebtelovimab (LY-CoV1404) is highly potent, which could have implications for reducing the number of antibodies necessary for clinical dosing, and potentially enabling a subcutaneous route of administration for either treatment or prevention of COVID-19. Pathway: SARS-CoV-2 spike glycoprotein [KO: K24152], ko03230; Viral genome structure, ko05171 COVID-19.

An in-depth assessment of mutations that could inhibit the neutralization of Bebtelovimab identified two specific amino acid positions that are very rarely mutated in the general population (0.027%), as reported in the GISAID database April 2021. In addition, the potent activity of Bebtelovimab against the currently known variants of concern (VOC) and pseudoviruses carrying various single amino acid mutations suggests that Bebtelovimab binds to an epitope that is highly conserved across SARS-CoV-2 isolates that have been collected worldwide.

AbCellera (Nasdaq: ABCL) announced on May 4, 2021, that LY-CoV1404 had entered human clinical trials. AbCellera also released preclinical data showing LY-CoV1404 binds to a rarely mutated region of the SARS-CoV-2 spike protein and neutralizes VOCs. In addition, on Jan. 9, 2022, AbCellera confirmed that bebtelovimab maintains both full and potent neutralization activity against the original Omicron variant.

On Feb. 11, 2022, U.S. Food and Drug Administration (FDA) issued an emergency use authorization (EUA) for bebtelovimab for the treatment of mild to moderate COVID-19 in certain people 12 years of age and older weighing at least 40 kilograms, with a positive COVID-19 test, and who are at high risk for progression to severe COVID-19, including hospitalization or death, and for whom alternative COVID-19 treatment options approved or authorized by the FDA are not accessible or clinically appropriate. Under the EUA, fact sheets that provide essential information about using bebtelovimab to treat COVID-19 as authorized must be made available to healthcare providers, patients, and caregivers. The fact sheets include dosing instructions, drug interactions, and potential side effects. The EUA was issued to Eli Lilly and Co.

The U.S. NIH issued 'COVID-19 Treatment Guidelines Panel published an updated Statement on the Role of Bebtelovimab for the Treatment of High-Risk, Nonhospitalized Patients With Mild to Moderate COVID-19' on Apr. 1, 2022 - Bebtelovimab is active against all circulating Omicron subvariants, but there are no clinical efficacy data on using bebtelovimab to treat patients who are at high risk of progressing to severe COVID-19. Bebtelovimab is not authorized to treat mild-to-moderate COVID-19 in geographic regions where the infection is likely caused by a non-susceptible SARS-CoV-2 variant. And on June 15, 2022, the CDC published: Interim Clinical Considerations for COVID-19 Treatment in Outpatients.

On June 21, 2022, the U.S. HHS's Assistant Secretary for Preparedness and Response confirmed that 28,985 doses of Bebtelovimab would be distributed to states, territories, and agencies this week. HHS has distributed about 458,431 Bebtelovimab doses in the USA since Feb. 14, 2022. 

Company-based disclosures are published at A revised Fact Sheet for Providers (EUA Revised Date: 05/20/22) and Emergency Use Authorization Letter 111 were published.

Eli Lilly and Company (NYSE: LLY), Based in Indianapolis, Indiana, was founded in 1876 and continues to monitor the COVID-19 pandemic and its global impact closely.

Bebtelovimab Omicron BA.x Sublineages

As of June 16, 2022, the U.S. NIH OpenData Portal reported Bebtelovimab's positive in vitro therapeutic activity against coronavirus variants. The AMA stated on May 24, 2022, 'Bebtelovimab has demonstrated in vitro effectiveness against BA.2 variants. Although there is insufficient data on hospitalization and mortality outcomes for patients with COVID-19 who received bebtelovimab, this agent has a mechanism of action that is similar to other anti-SARS-CoV-2 monoclonal antibodies that have been shown to cut hospitalization or death among high-risk patients.'

On May 17, 2022, Lilly representatives indicated Bebtelovimab was found effective against new Omicron BA.2 variants. The NIH published an update regarding bebtelovimab's activity against a broad range of SARS-CoV-2 variants, including Omicron BA.1 and BA.2 subvariants, on March 2, 2022. And a study published by the peer-reviewed journal Nature on Mar. 3, 2022, LY-CoV1404 (bebtelovimab) was the only authorized mAbs therapy adequately covering all sublineages of the Omicron variant.

The peer-review journal Cell Reports described LY-CoV1404 (bebtelovimab) on April 25, 2022, with a broad spectrum of activity across all current variants (BA.2 subvariant), and the Binding epitope on RBD of SARS-CoV-2 is rarely mutated based on current GISAID data. And a peer-reviewed study published by Science Translational Medicine on April 5, 2022, found SARS-CoV-2 BA.1 variant evades most therapeutic antibodies. Other cocktail products (Bamlanivimab:Etesevimab: Bebtelovimab) remained potent. And the combinations of antibodies, especially ones that may synergize, likely provide better resilience to emerging variants.

On March 25, 2022, the U.S. HHS/ASPR stated bebtelovimab is a monoclonal antibody therapy and based on vitro assay data currently available, this mAbs product is likely to retain activity against the BA.2 variant.

The U.S. CDC's NowCast estimates more recent proportions of circulating variants, as does Stanford's HIVDB team website displays updated mAbs effectiveness. 

Bebtelovimab Availability

As of Feb. 11, 2022, Eli Lilly and Co. announced an agreement with the U.S. government to supply up to 600,000 doses of bebtelovimab no later than Mar. 31, 2022, with an option of 500,000 additional doses for delivery no later than July 31, 2022. 

Bebtelovimab Dosage

Provider Fact Sheet as of March 25, 2022: DOSAGE AND ADMINISTRATION: The dosage in adults (18 years and older) and pediatric patients (≥12 years of age and weighing at least 40 kg) is bebtelovimab 175 mg administered as a single intravenous injection over at least 30 seconds. Administer bebtelovimab as soon as possible after positive results of direct SARS-CoV-2 viral testing and within seven days of symptom onset. No contraindications have been identified based on the limited available data for the emergency use of bebtelovimab.

Bebtelovimab Drug Interactions

Bebtelovimab is not renally excreted or metabolized by cytochrome P450 enzymes; therefore, interactions with concomitant medications that are renally excreted or that are substrates, inducers, or inhibitors of cytochrome P450 enzymes are unlikely. No contraindications have been identified based on the limited available data for the emergency use of bebtelovimab authorized under this EUA.

Bebtelovimab Side Effects

Possible side effects of bebtelovimab include itching, rash, infusion-related reactions, nausea, and vomiting. Serious and unexpected adverse events, including hypersensitivity, anaphylaxis, and infusion-related reactions, have been observed with other SARS-CoV2 monoclonal antibodies and could occur with bebtelovimab. Most common adverse reactions are infusion-related reactions (0.3%), pruritus (0.3%), and rash (0.8%). In addition, clinical worsening following administration of other SARS-CoV-2 monoclonal antibody treatment has been reported and therefore is possible with bebtelovimab. However, it is unknown if these events were related to SARS-CoV-2 monoclonal antibody use or were due to the progression of COVID-19.

Bebtelovimab Shelf Life

On May 20, 2022, the FDA and HHS/ASPR announced the authorization of an extension to the shelf-life from 12 months to 18 months for specific lots of the refrigerated Eli Lilly monoclonal antibody, bebtelovimab.

Bebtelovimab Revenues

AbCellera (Nasdaq: ABCL) reported royalties associated with bamlanivimab and bebtelovimab were $307.0 million in Q1 2021. 

Eli Lilly & Co. confirmed on February 10, 2022, that the pending agreement with the U.S. government's estimated financial impact in 2022 is at least $720 million of revenue and approximately $0.20 of EPS. Previously, the Company recognized U.S. revenue from COVID-19 antibodies of $1.029 billion in the fourth quarter of 2021 compared to $850 million in the fourth quarter of 2020. Excluding COVID-19 antibodies, Lilly's revenue in the U.S. increased by 11%.

Bebtelovimab News

June 15, 2022 - The U.S. CDC confirmed its Interim Clinical Considerations include 'When Paxlovid or remdesivir are not accessible or clinically appropriate, the monoclonal antibody bebtelovimab can be used.'

May 20, 2022 - The U.S. FDA and HHS/ASPR announced the authorization of an extension to the shelf-life from 12 months to 18 months for specific lots of the refrigerated bebtelovimab.

May 18, 2022 - Eli Lilly reported that internal testing has confirmed that bebtelovimab is effective against BA.2 and BA2.12.1 variants.

May 11, 2022 - Wiley Online Library published: Understanding Omicron: Transmissibility, immune evasion, and antiviral intervention.

May 2, 2022 - The Wisconsin Department of Health Services confirmed Bebtelovimab availability.

April 8, 2022 - The NASDAQ published an article: The fate of antibody treatments for COVID-19 looks uncertain, with the FDA recently revoking the previously granted Emergency Use Authorization given their lack of efficacy against the predominant Omicron variant in the U.S.

April 8, 2022 - The U.S. NIH confirmed there are therapeutic options available to treat nonhospitalized adults with mild to moderate COVID-19 who are at high risk of disease progression.

March 25, 2022 - The U.S. FDA published an updated Provider Fact Sheet for Bebtelovimab.

March 24, 2022 - The State of Washington confirmed antibody and other COVID-19 treatments are effective and available.

March 11, 2022 - The LA Times reported that anti-COVID drugs given intravenously are not part of the “test to treat” pharmacy program.

March 2, 2022 - The U.S. NIH updated its treatment guidelines for bebtelovimab. 

February 23, 2022 - The journal Nature published an article: Will a rising Omicron variant scramble antibody treatments?

February 11, 2022 - The U.S. FDA announced it had issued a EUA for Bebtelovimab applicable to specific people over the age of twelve. Bebtelovimab is not authorized for patients who are hospitalized due to COVID-19 or require oxygen therapy due to COVID-19. Treatment with bebtelovimab has not been studied in patients hospitalized due to COVID-19. The issuance of a EUA is different than an FDA Approval.

February 3, 2022 - Eli Lilly reported the Company submitted a request to the U.S. FDA for a EUA for bebtelovimab for the treatment of mild-to-moderate COVID-19 in adults and pediatric patients 12 years of age and older. Authentic virus analysis of bebtelovimab confirms earlier pseudovirus findings, demonstrating that Lilly's investigational antibody neutralizes concern variants, including Omicron.

January 9, 2022 - AbCellera and its collaborators released new preclinical data showing the pseudovirus neutralization status of its two monoclonal antibodies, bamlanivimab and bebtelovimab (LY-CoV1404), against the Omicron variant. In addition, the data confirmed that the investigational antibody bebtelovimabs, currently in Phase 2 clinical trials with Eli Lilly and Company, maintains full and potent neutralization activity against the Omicron variant and all other known SARS-CoV-2 variants of concern.

January 7, 2022 - The U.S. NIH published 'the breadth of reactivity to amino acid substitutions present among current VOC together with broad and potent neutralizing activity and the relatively conserved epitope suggest that LY-CoV1404 has the potential to be an effective therapeutic agent to treat all known virus variants causing COVID-19.'

January 5, 2022 - The journal Nature published a Letter: SARS-CoV-2 Omicron RBD shows weaker binding affinity than the currently dominant Delta variant to human ACE2. In conclusion, both MD simulation and ELISA bioassay results suggest that the Omicron variant possesses comparable binding affinity to human ACE2 than the wild-type SARS-CoV-2 but much weaker binding affinity than the Delta variant. Accordingly, the Omicron variant might have similar infection capability to the WT virus but milder than Delta if the capability depends mainly on the binding affinity. In addition, the MD simulations indicate that the new variant Omicron has a high risk of immune evasion. Accordingly, close attention should be paid intensively to Omicron as its high immune evasion risk may enable its easy transmission.

September 9, 2021 - The U.S. NIH highlighted a non-peer-reviewed study: LY-CoV1404 (bebtelovimab) potently neutralizes SARS-CoV-2 variants. The RBD positions comprising the LY-CoV1404 epitope are highly conserved, except for N439 and N501; notably, the binding and neutralizing activity of LY-CoV1404 is unaffected by the most common mutations at these positions (N439K and N501Y).

May 4, 2021 - AbCellera today announced that a second antibody from its collaboration with Eli Lilly and Company, LY-CoV1404, has entered clinical trials in patients with mild-to-moderate COVID-19. Lilly has expanded its ongoing BLAZE-4 trials to evaluate LY-CoV1404 alone and together with other monoclonal antibodies.

Bebtelovimab Clinical Trials

A Randomized, Double-blind, Placebo-Controlled, Phase 2 Study to Evaluate the Efficacy and Safety of Mono and Combination Therapy With Monoclonal Antibodies in Participants With Mild to Moderate COVID-19 Illness (BLAZE-4).

AbCellera released preclinical data showing LY-CoV1404 binds to a rarely mutated region of the SARS-CoV-2 spike protein and neutralizes all currently known variants of concern.

Clinical Trials

No clinical trials found