Novavax, Inc. (Nasdaq: NVAX), today announced initial data evaluating the immune response of its COVID-19 vaccine, NVX-CoV2373, against the Omicron variant as well as additional data from its ongoing Phase 2 boost study.
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- Two-dose primary regimen of NVX-CoV2373 demonstrated cross-reactive immune responses against Omicron (B.1.1.529) and other variants - Third dose produced increased immune responses comparable to or exceeding levels associated with protection in Phase 3 clinical trials, with a 9.3-fold IgG rise and a 19.9-fold ACE2 inhibition increase after booster dose - Immune responses in adolescents were 2- to 4-fold higher than adults against broad array of variants of interest and variants of concern - Development of Omicron-specific vaccine on track for initiation of GMP manufacturing in early January - Company to host investor conference call today from 4:30 - 5:00 pm ET GAITHERSBURG, Md., Dec. 22, 2021 /PRNewswire/ -- Novavax, Inc. (Nasdaq: NVAX), a biotechnology company dedicated to developing and commercializing next-generation vaccines for serious infectious diseases, today announced initial data evaluating the immune response of its COVID-19 vaccine, NVX-CoV2373, against the Omicron variant as well as additional data from its ongoing Phase 2 boost study. New results demonstrate broad cross-reactivity against Omicron and other circulating variants from a primary 2-dose regimen, with responses that increased following a third dose at six months. Immune responses included the following:
Further, data from the pediatric expansion of Novavax' PREVENT-19 Phase 3 trial in the U.S. and Mexico showed robust immune responses in adolescents, including increased IgG and receptor inhibition titers against a wide array of variants, including Omicron, following a 2-dose series. Responses in adolescents were 2- to 4-fold higher than adults against all evaluated variants. "In the midst of an evolving pandemic, NVX-CoV2373 showed strong immune responses against Omicron and other circulating variants. We are encouraged that boosted responses against all variants were comparable to those associated with high vaccine efficacy in our Phase 3 clinical trials, suggesting that NVX-CoV2373 can play an important role in the ongoing fight against new variants," said Gregory M. Glenn, President of Research and Development, Novavax. "Given the continued evolution of the coronavirus, the development of an Omicron vaccine could be necessary. Novavax has cloned, expressed and characterized the Omicron spike protein vaccine and will soon enter the GMP-phase of production. We expect to begin clinical studies in the first quarter of 2022." As part of an ongoing study, a single booster dose of 5 µg SARS-CoV-2 rS with 50 µg Matrix-M™ adjuvant was administered to healthy adult participants approximately six months after their primary 2-dose vaccination series. Multiple assays were used to evaluate immune responses against SARS-CoV-2 twenty-eight days following the booster dose. Safety reporting of reactogenicity events showed an increasing trend across all 3 doses of NVX-CoV2373, reflecting the increased immunogenicity seen with a third dose. Following the booster, local and systemic reactions were generally short-lived with a median duration of approximately 2 days. The incidence of Grade 3 or higher events remained relatively low. Medically attended adverse events (MAAEs), potentially immune-mediated medical conditions (PIMMCs), and severe adverse events (SAEs) occurred infrequently following the booster dose and were balanced between vaccine and placebo groups. The major findings, detailed in 'Immunogenicity and Safety Following a Homologous Booster Dose of a SARS-CoV-2 recombinant spike protein vaccine (NVX-CoV2373): A Phase 2 Randomized Placebo-Controlled Trial,' will be submitted for peer-review publication and are expected to be available online at https://www.medrxiv.org/ in the coming days. 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 March 22, 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. The current assigned shelf life of the vaccine is 9 months. Novavax has established partnerships for the manufacture, commercialization and distribution of NVX-CoV2373 worldwide. About the NVX-CoV2373 Phase 3 trials A trial conducted in the U.K. with 14,039 participants 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 the New England Journal of Medicine (NEJM). PREVENT-19, a trial in the U.S. and Mexico, with 25,452 participants, 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%. The key secondary endpoint is 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 in both studies. Full results of the trial were published in NEJM. About Matrix-M™ Adjuvant About Novavax For more information, visit www.novavax.com and connect with us on Twitter, LinkedIn, Instagram and Facebook. Forward-Looking Statements Contacts: Investors Solebury Trout Media
SOURCE Novavax, Inc. |
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Company Codes: NASDAQ-NMS:NVAX |
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