Vaccine Info

Sanofi-GSK COVID-19 Vaccine (Vidprevtyn)

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Last reviewed
June 13, 2022

Sanofi-GSK COVID-19 Vaccine (Vidprevtyn) For 2022

The Sanofi-GSK codeveloped (Vidprevtyn) (VAT00002, VAT00008) protein-based vaccine candidate combines innovative technologies to produce an adjuvanted recombinant protein-based COVID-19 vaccine. Combining a protein-based antigen and an adjuvant is a well-established technology in several vaccines.

Sanofi Pasteur is contributing its S-protein COVID-19 antigen based on recombinant DNA technology. This Sanofi technology has produced an exact genetic match to proteins found on the surface of the SARS-CoV-2 coronavirus. In addition, the DNA sequence encoding this antigen has been combined into the baculovirus expression platform's DNA, based on Sanofi's licensed recombinant influenza Flublok product in the USA.

GSK contributed to its proven adjuvant technology. An adjuvant is added to some vaccines to enhance the immune response and has been shown to create a more robust and longer-lasting immunity against infections than the vaccine alone.

On July 31, 2020, the U.S. government stated it would provide up to $2.1 billion for development, including clinical trials and manufacturing scale-up, and delivery of an initial 100 million doses. The vaccines intended for the USA will be produced in Sanofi's Swiftwater, PA facility. In addition, the U.S. government has a further option to discuss purchasing up to 500 million doses long-term.

Sanofi and GSK announced that on December 11, 2020, a Phase 1/2 study showed an immune response comparable to patients who had recovered from COVID-19 in adults aged 18 to 49 years but a lower immune response in older adults, likely due to an insufficient concentration of the antigen. On May 17, 2021, the companies confirmed that 'The Phase 2 interim results showed 95% to 100% seroconversion following a second injection in all age groups (18 to 95 years old) and across all doses, with acceptable tolerability and with no safety concerns. 

The EMA confirmed on July 20, 2021, the CHMP committee had started a rolling review of Vidprevtyn. In the VAT0008 Phase 3 primary series trial, two doses of the Sanofi-GSK vaccine in seronegative populations demonstrated 100% efficacy against severe COVID-19 disease and hospitalizations; 75% efficacy against moderate or severe COVID-19 disease; 57.9% efficacy against any symptomatic COVID-19 disease, in line with expected vaccine effectiveness in today's environment dominated by variants of concern, as of Feb. 23, 2022. On March 30, 2022, the EMA confirmed it began a Rolling Review of the vaccine candidate.

Additionally, on February 23, 2022, the companies announced that we intend to submit data from both our booster and Phase 3 efficacy trials as the basis for regulatory applications for a COVID-19 vaccine. To evaluate the immunogenicity of the Sanofi-GSK vaccine as a booster, human immune sera samples were tested by Monogram Biosciences, located in San Francisco, CA, using an FDA-approved standardized pseudovirus neutralization test against the D614G prototype virus.

On May 27, 2022, the results of the COVIBOOST study became available on a pre-print server, pending publication in a peer-reviewed journal.

Federal U.S. funds from the BARDA, in collaboration with the U.S. Department of Defense Joint Program Executive Office for Chemical, Biological, Radiological, and Nuclear Defense under Contract # W15QKN-16-9-1002, supported the vaccine research. DrugBank Accession Number: DB16427; ATC code J07BX03.

GSK is a science-led global healthcare company with a special purpose: to help people do more, feel better, live longer. GSK is the leading manufacturer of vaccines globally.

Sanofi is dedicated to supporting people through their health challenges. "We are a global biopharmaceutical company focused on human health. We prevent illness with vaccines, provide innovative treatments to fight pain, and ease suffering. We stand by the few who suffer from rare diseases and the millions with long-term chronic conditions."

Sanofi-GSK COVID-19 Vaccine (Vidprevtyn) Indication

Sanofi - GSK Vidprevtyn vaccine candidate is indicated to prevent SARS-CoV-2 coronavirus infection, leading to COVID-19 in humans. Pediatric, oncology, and pregnancy vaccine efficacy verification are pending. 

Sanofi-GSK COVID-19 Vaccine (Vidprevtyn) Booster

The companies announced on June 13, 2022, in the Phase 3 VAT02 Cohort 2 study, the Sanofi-GSK next-generation vaccine candidate induced (at day 15 post-immunization) a significant boost in antibody titers above baseline against multiple variants of concern (15-fold increase against D614 parent virus, 30-fold increase against Beta strain) in adults previously primed with mRNA COVID-19 vaccines. In particular, against Omicron, preliminary data show a 40-fold increase against BA.1. The Sanofi-GSK next-generation booster candidate generated double the number of neutralizing antibodies against Omicron BA.1 and BA.2 compared to the D614-based (original parent virus) booster.

In participants (VAT00002) who had received a primary series of an already authorized mRNA or adenovirus vaccine, the Sanofi-GSK booster vaccine induced a significant increase in neutralizing antibodies of 18- to 30-fold across vaccine platforms and age groups. When the Sanofi-GSK vaccine was used as a two-dose primary series followed by a booster dose, neutralizing antibodies increased 84- to 153-fold compared to pre-boost levels. The vaccine's booster studies began in the U.S., Australia, France, and the U.K.

    Sanofi-GSK COVID-19 Vaccine (Vidprevtyn) Variants of Concern

    Sanofi Pasteur is developing monovalent and bivalent vaccines for use as a universal late booster and/or variant prime vaccines to address the emergence of variant strains, which will be studied in three additional Phase 3 study cohorts that are added to the initial Phase 2 protocol cohorts. On June 13, 2022, the next-generation booster vaccine candidate demonstrated the potential to protect against COVID-19 VoCs, including Omicron BA.1 and BA.2.

    Sanofi-GSK COVID-19 Vaccine (Vidprevtyn) Dosage

    The randomized, double-blind, multi-center-dose-ranging phase 2 study was conducted in healthy adults aged 18 years of age and older, including those with high-risk medical conditions, to evaluate the safety, reactogenicity, and immunogenicity of two injections given 21 days apart, with 3 antigen dose levels of 5, 10 and 15 µg.

    Sanofi-GSK COVID-19 Vaccine (Vidprevtyn) News For 2021 - 2022

    June 13, 2022 - Sanofi reported data from two trials, VAT02 Cohort 2 and COVIBOOST VAT013, conducted with its new next-generation COVID 19  booster vaccine candidate modeled on the Beta variant antigen and including GSK's pandemic adjuvant. Next-generation booster vaccine candidate demonstrates potential to protect against COVID-19 variants of concern, including Omicron BA.1 and BA.2, with a favorable safety and tolerability profile.

    March 30, 2022 - The Paul-Ehrlich-Institut, an Agency of the German Federal Ministry of Health, confirmed the Committee for Medicinal Products for Human Use (CHMP) at the EMA started the evaluation procedure on 30 March 2022 for the conditional marketing authorization application submitted by Sanofi Pasteur for the protein-based SARS-CoV-2 vaccine Vidprevtyn. The EMA began its rolling review on 20 July 2021.

    February 23, 2022 - Sanofi and GSK announced that they intend to submit data from both their booster and Phase 3 efficacy trials as the basis for regulatory applications for a COVID-19 vaccine.

    December 15, 2021 - The Sanofi and GSK announced their jointly developed booster vaccine showed neutralizing antibodies increased 9- to 43-fold regardless of the primary vaccine received (AstraZeneca, Johnson & Johnson, Moderna, Pfizer/BioNTech) and was found well tolerated, with a safety profile similar to currently approved COVID-19 vaccines.

    September 28, 2021 - Sanofi announced it continues its efforts to fight against the COVID-19 pandemic with its adjuvanted recombinant protein candidate vaccine, developed in partnership with GSK. In parallel to its ongoing Phase 3 efficacy and safety study, Sanofi has expanded its development program to include a study of the vaccine as a potentially broadly protective booster to address evolving public health needs.

    September 21, 2021 - A non-peer-reviewed study findings show that the vaccine candidates used as a booster have the potential to offer cross-protection against a broad spectrum of variants. This has important implications for vaccine control of SARS-CoV-2 variants of concern and informs on the benefit of a booster with our vaccine candidates currently under evaluation in phase 2 and 3 clinical trials (NCT04762680 and NCT04904549).

    August 7, 2021 - The online journal Springer published a 'Rolling review of COVID-19 vaccine Vidprevtyn by EMA. The review will continue until the CHMP decides that sufficient data are available for a formal marketing authorization application. EMA will assess the compliance of Vidprevtyn with the usual E.U. standards for effectiveness, safety, and quality.

    July 20, 2021 - The European Medicines Agency confirmed the human medicines committee had started a rolling review of Vidprevtyn, a COVID-19 vaccine developed by Sanofi Pasteur. The CHMP's decision to start the rolling review is based on preliminary results from laboratory studies (non-clinical data) and early clinical studies in adults, which suggest that the vaccine triggers the production of antibodies that target the SARS-CoV-2 coronavirus that causes COVID-19 and may help protect against the disease.

    July 8, 2021 - Sanofi and GSK received approval for their Phase 3 clinical study in India to assess the safety, efficacy, and immunogenicity of their adjuvanted recombinant-protein COVID-19 vaccine candidate. The global, randomized, double-blind Phase 3 study will include more than 35,000 volunteers aged 18 and older across the USA, Asia, Africa, and Latin America.

    May 27, 2021 - Sanofi and GSK announced they started enrollment in their Phase 3 clinical study to assess the safety, efficacy, and immunogenicity of their adjuvanted recombinant-protein COVID-19 vaccine candidate. The global, randomized, double-blind placebo-controlled Phase 3 study will include more than 35,000 volunteers aged 18 and older from several countries, including US, Asia, Africa, and Latin America sites. The study's primary endpoint is the prevention of symptomatic COVID-19 in SARS-CoV-2 naïve adults, with secondary endpoints preventing severe COVID-19 disease and the prevention of asymptomatic infection. 

    May 17, 2021 -  Sanofi and GSK announced the adjuvanted recombinant COVID-19 vaccine candidate achieved strong rates of neutralizing antibody responses, in line with those measured in people who have recovered from COVID-19 in all adult age groups in a Phase 2 study with 722 volunteers. Pending positive Phase 3 outcomes and regulatory reviews, the vaccine is expected to be approved in the fourth quarter of 2021.

    March 11, 2021 - A non-peer-reviewed study reported: 'sera from 501Y.V2-infected patients also neutralized the 501Y.V3 (P.1) variant first described in Brazil and now circulating globally. Collectively these data suggest that the antibody response in patients infected with 501Y.V2 has broad specificity and that vaccines designed with the 501Y.V2 sequence may elicit more cross-reactive responses.'

    February 21, 2021 - Sanofi and GSK have initiated a phase 2 study to determine the appropriate dosage of their adjuvanted recombinant protein vaccine. The trial will include healthy adults 18 to 59 and an equal number of those adults over 60 years and older.

    December 11, 2020 - Sanofi and GSK announce a delay in their adjuvanted recombinant protein-based COVID-19 vaccine program to improve older adults' immune response. Phase 1/2 study interim results showed an immune response comparable to patients who recovered from COVID-19 in adults aged 18 to 49 years, but a low immune response in older adults likely due to an insufficient concentration of the antigen. Sanofi and GSK adjuvanted recombinant protein-based vaccine candidate was selected in July 2020 by the U.S. government's Operation Warp Speed to accelerate its development and manufacturing.

    December 3, 2020 - Sanofi vaccines chief Thomas Triomphe said 'the company will announce the price of the potential COVID-19 vaccine developing with Britain's GlaxoSmithKline after it has released Phase I/II results of the trials. The company is expected to release the Phase I/II clinical trials this month (December).'

    October 28, 2020 - Sanofi and GSK announced they intend to make available 200 million doses of their adjuvanted recombinant protein-based COVID-19 vaccine, if approved by regulatory authorities and subject to contract, to the COVAX Facility. 

    September 22, 2020 - Sanofi and GSK announced agreements with the Government of Canada to supply up to 72 million doses of an adjuvanted COVID-19 vaccine, beginning in 2021. The Companies initiated a Phase 1/2 study on September 3, with 440 subjects being enrolled. They anticipate the first results in early December 2020 to support initiating a pivotal Phase 3 study before the end of the year.

    September 17, 2020 - Sanofi and GSK finalized an agreement with the European Commission to supply up to 300 million doses of a COVID-19 vaccine once the vaccine is approved. This final agreement confirms both companies' announcement made on July 31, 2020, and marks a key milestone in protecting European populations against COVID-19. The contract will allow the purchase of a vaccine against COVID-19 for all Member States of the European Union (E.U.)

    September 3, 2020 - Sanofi and GSK announced the Phase 1/2 clinical trial for their adjuvanted COVID-19 vaccine. The vaccine candidate, developed in partnership with Sanofi and GSK, uses the same recombinant protein-based technology as Sanofi's seasonal influenza vaccines with GSK's established pandemic adjuvant technology.

    August 4, 2020 - Sanofi confirmed its upcoming venture to develop a COVID-19 vaccine with fellow pharmaceutical giant GlaxoSmithKline and the United States government, including plans to conduct manufacturing at Sanofi's Swiftwater PA, location. The company is currently building up its industrial capabilities to manufacture up to one billion doses a year, some of which will be done locally. "Our Swiftwater facility will conduct finish and fill for the U.S. doses."

    July 31, 2020 - Sanofi and GSK announce a collaborative effort with the U.S. government to accelerate developing and manufacturing a COVID-19 recombinant protein-based vaccine. The U.S. government will provide up to $2.1 billion, more than half of which supports further development of the vaccine, including clinical trials. The remainder is used for manufacturing scale-up and delivery of an initial 100 million doses of the vaccine.

    July 29, 2020 - Sanofi and GSK announced an agreement, subject to a final contract, with the U.K. government to supply up to 60 million doses of a COVID-19 vaccine. Sanofi, the vaccine candidate, in partnership with GSK, is based on the recombinant protein-based technology used by Sanofi to produce an influenza vaccine and GSK's established pandemic adjuvant technology. And, ongoing discussions with the European Commission, France, and Italy on the negotiation team and other governments ensure global access to a novel coronavirus vaccine.

    June 23, 2020 - Sanofi S.A. said it expects to get approval for the potential COVID-19 vaccine developing with Britain's GlaxoSmithKline Plc. by the first half of 2021, faster than previously anticipated.

    May 13, 2020 - Sanofi's Chief Executive Officer Paul Hudson said in an interview with Bloomberg News, 'he warned that Europe risks falling behind unless it steps up efforts to seek protection against a pandemic that's killed more than 290,000 people worldwide.'

    April 14, 2020 - Sanofi and GSK announced that they had signed a letter of intent to develop an adjuvanted vaccine for COVID-19, using innovative technology from both companies to address the ongoing pandemic.

    February 18, 2020 - David Loew, Sanofi's global head of vaccines, announced the company would partner with the U.S. Biomedical Advanced Research and Development Authority—known as BARDA—to make a vaccine using the company's recombinant DNA platform.

    Sanofi-GSK COVID-19 Vaccine (Vidprevtyn) Clinical Trials

    The Sanofi and GSK adjuvanted recombinant COVID-19 vaccine candidate Vidprevtyn achieved strong rates of neutralizing antibody responses, in line with those measured in people who have recovered from COVID-19 in all adult age groups in a Phase 2 study with 722 volunteers. A global pivotal Phase 3 study is expected to start in the coming weeks.

    The companies plan to initiate a global Phase 3, randomized, double-blind study with the 10µg dose, combined with GSK's pandemic adjuvant, in the coming weeks. This Phase 3 trial is expected to enroll more than 35,000 adult participants from a broad range of countries. It will assess the efficacy of two vaccine formulations, including the D614 (Wuhan) and B.1.351 (South African) variants.