Novavax, Inc. (Nasdaq: NVAX),today announced that NVX-CoV2373, its recombinant nanoparticle protein-based COVID-19 vaccine, achieved its primary effectiveness endpoint in the pediatric expansion of its PREVENT-19 pivotal Phase 3 trial and demonstrated 80% efficacy overall at a time when the Delta variant was the predominant circulating strain in the U.S.
| - PREVENT-19 pediatric expansion in adolescents aged 12 through 17 achieved primary effectiveness endpoint demonstrating comparability to adult population - Trial demonstrated 82% clinical efficacy against Delta variant - Immune responses were about two-to-three-fold higher in adolescents than in adults against all variants studied - Vaccine was well-tolerated with no safety signals identified - Novavax plans to supplement global regulatory filings with pediatric data in Q1 2022 - Company to host investor conference call today from 4:30 - 5:00 pm ET GAITHERSBURG, Md., Feb. 10, 2022 /PRNewswire/ -- Novavax Inc. (Nasdaq: NVAX), a biotechnology company dedicated to developing and commercializing next-generation vaccines for serious infectious diseases, today announced that NVX-CoV2373, its recombinant nanoparticle protein-based COVID-19 vaccine, achieved its primary effectiveness endpoint in the pediatric expansion of its PREVENT-19 pivotal Phase 3 trial and demonstrated 80% efficacy overall at a time when the Delta variant was the predominant circulating strain in the U.S. The study enrolled 2,247 adolescents aged 12 through 17-years across 73 sites in the U.S. to evaluate safety, effectiveness (immunogenicity), and efficacy, with an emphasis on ensuring well balanced racial and ethnic representation among participants. “We are encouraged by the results in this adolescent population given the ongoing need for alternative vaccine options for COVID-19,” said Filip Dubovsky, MD, Chief Medical Officer, Novavax. “We believe the Novavax vaccine offers a differentiated technology and option for this younger population given its established protein-based technology already used in other vaccines, and the positive responses demonstrated against variants.” The primary PREVENT-19 pivotal Phase 3 trial conducted in adults aged 18 years and older, results of which were published in The New England Journal of Medicine (NEJM), enrolled approximately 30,000 participants in the U.S. and Mexico. NVX-CoV2373 achieved 90.4% efficacy overall and demonstrated a reassuring safety and tolerability profile. Serious and severe adverse events in adults were low in number and balanced between vaccine and placebo groups. The most common adverse reactions observed in adults during clinical studies (frequency category of very common ≥1/10) were headache, nausea or vomiting, myalgia, arthralgia, injection site tenderness/pain, fatigue, and malaise. Novavax will continue to collect and analyze real-world data, for both the primary PREVENT-19 trial and the pediatric expansion, including the monitoring of safety and the evaluation of variants, as the vaccine is distributed. NVX-CoV2373 has not yet been authorized in the adolescent population. Novavax expects to submit its regulatory filings for a pediatric indication in adolescents aged 12 through 17-years to global regulatory authorities during the first quarter of 2022. Novavax also expects to initiate additional studies globally evaluating younger age groups during the second quarter of 2022. To date, NVX-CoV2373 has received authorization from multiple regulatory authorities globally, including conditional marketing authorization from the European Commission, the Medicines and Healthcare products Regulatory Agency, and emergency use listing (EUL) from the World Health Organization (WHO). With WHO EUL, there is the opportunity for authorization in over 170 countries with a potential reach of over six billion lives. The vaccine is also currently under review by multiple regulatory agencies worldwide, including the U.S. Food and Drug Administration (FDA). Results: Clinical efficacy consistent between adolescent and adult participants In the placebo-controlled, observer-blinded study, adolescent participants were randomized 2:1 to receive active vaccine or placebo. Study participants underwent blinded crossover to alternate study material after the required safety data were collected to ensure that all participants received active vaccine. During the period of placebo-controlled observation, NVX-CoV2373 demonstrated overall protective efficacy of 79.5% (95% CI: 46.8, 92.1) against COVID-19. Efficacy was consistent across age groups and all cases observed in the vaccine group were mild as defined by the trial protocol. Efficacy endpoints were accrued from May 24 through September 27, 2021 – a time when the Delta variant was the predominant strain in the U.S., showing high transmission and high severity of disease. Sequence data are available for 11 of the 20 confirmed cases, 100% of which were determined to be caused by the Delta variant. Vaccine efficacy against the Delta variant was 82.0% (95% CI: 32.4, 95.2). Results: Consistent response to variants Data from the pediatric expansion of PREVENT-19 showed in post hoc analyses robust immune responses in adolescents, including IgG responses against Spike proteins of several variants (including Alpha, Beta, Delta, Gamma, Mu, and Omicron) that were 2-3-fold higher than in adults, with 100% seroconversion against all variants following a 2-dose series of vaccinations. Adolescent functional immune responses (hACE2 receptor inhibition) against these variants were 2.4-4-fold higher than in adults against all evaluated variants. Results: A reassuring safety and reactogenicity profile Preliminary safety data from the pediatric expansion of PREVENT-19 showed the vaccine to be generally well-tolerated. Serious and severe adverse events were low in number and balanced between vaccine and placebo groups, and not considered related to the vaccine. Local and systemic reactogenicity was generally lower than or similar to adults, after the first and second dose. The most common adverse reactions observed were injection site tenderness/pain, headache, myalgia, fatigue, and malaise. There was no increase in reactogenicity in younger (12 to <15 years old) adolescents compared to older (15 to <18 years old) adolescents. No safety signal was observed through the placebo-controlled portion of the study. Study Endpoints The pediatric expansion of PREVENT-19 achieved its primary effectiveness (immunogenicity) endpoint, with neutralizing antibody responses non-inferior to those observed in young-adult (18 to 26 years old) participants from PREVENT-19. Adolescent neutralizing antibody responses using wild-type SARS-CoV-2 were approximately 1.5-fold higher in adolescents than in young adults, meeting FDA-specified criteria. About PREVENT-19 PREVENT-19 is being conducted with support from the U.S. government, including the Department of Defense, the Biomedical Advanced Research and Development Authority (BARDA), part of the Office of the Assistant Secretary for Preparedness and Response at the U.S. Department of Health and Human Services (HHS), and the National Institute of Allergy and Infectious Diseases (NIAID), part of the National Institutes of Health (NIH) at HHS. BARDA is providing up to $1.75 billion under a Department of Defense agreement. Conference Call A webcast of the conference call can also be accessed on the Novavax website at novavax.com/events. A replay of the webcast will be available on the Novavax website until May 10, 2022. About NVX-CoV2373 Novavax’ COVID-19 vaccine is packaged as a ready-to-use liquid formulation in a vial containing ten doses. The vaccination regimen calls for two 0.5 ml doses (5 mcg antigen and 50 mcg Matrix-M adjuvant) given intramuscularly 21 days apart. The vaccine is stored at 2°- 8° Celsius, enabling the use of existing vaccine supply and cold chain channels. Use of the vaccine should be in accordance with official recommendations. Novavax has established partnerships for the manufacture, commercialization and distribution of NVX-CoV2373 worldwide. Existing authorizations leverage Novavax’ manufacturing partnership with Serum Institute of India (SII), the world’s largest vaccine manufacturer by volume. They will later be supplemented with data from additional manufacturing sites throughout Novavax’ global supply chain. About the NVX-CoV2373 Phase 3 trials PREVENT-19, a trial in the U.S. and Mexico that enrolled almost 30,000 participants aged 18 years and older, achieved 90.4% efficacy overall. It was designed as a 2:1 randomized, placebo-controlled, observer-blinded study to evaluate the efficacy, safety and immunogenicity of NVX-CoV2373. The primary endpoint for PREVENT-19 was the first occurrence of PCR-confirmed symptomatic (mild, moderate or severe) COVID-19 with onset at least 7 days after the second dose in serologically negative (to SARS-CoV-2) adult participants at baseline. The statistical success criterion included a lower bound of 95% CI >30%. A secondary endpoint was the prevention of PCR-confirmed, symptomatic moderate or severe COVID-19. Both endpoints were assessed at least seven days after the second study vaccination in volunteers who had not been previously infected with SARS-CoV-2. It was generally well-tolerated and elicited a robust antibody response after the second dose in both studies. Full results of the trial were published in the New England Journal of Medicine (NEJM). A trial conducted in the U.K. with 14,039 participants aged 18 years and older was designed as a randomized, placebo-controlled, observer-blinded study and achieved overall efficacy of 89.7%. The primary endpoint was based on the first occurrence of PCR-confirmed symptomatic (mild, moderate or severe) COVID-19 with onset at least 7 days after the second study vaccination in serologically negative (to SARS-CoV-2) adult participants at baseline. Full results of the trial were published in NEJM. About Matrix-M™ Adjuvant About Novavax
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SOURCE Novavax, Inc. | ||
Company Codes: NASDAQ-NMS:NVAX |
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