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     219  0 Kommentare Novavax Announces Positive Preclinical Data for Combination Influenza and COVID-19 Vaccine Candidate - Seite 2

    Hamsters that received the combination NanoFlu/NVX-CoV2373 vaccine had elevated levels of SARS-CoV-2 anti-S IgG two weeks after the first immunization, which increased significantly after a second dose, with levels comparable to animals that received the NVX-CoV2373 vaccine alone. Human ACE2 receptor inhibiting antibody levels responded similarly. The immune responses to influenza A and B strains elicited by NanoFlu/NVX-CoV2373 were comparable to immunization with NanoFlu alone. Further, the combination vaccine induced antibodies against SARS-CoV-2 neutralizing epitopes, including at hidden or cryptic sites, that are common between USA-WA1 and the B.1.351 variant.

    Protection after SARS-CoV-2 challenge

    When hamsters were challenged with SARS-CoV-2, animals immunized with NanoFlu/NVX-CoV2373 retained their body weight comparably to non-infected animals and those immunized with NVX-CoV2373 alone. An examination of viral load in the upper and lower respiratory tract showed that little or no virus was detected four days after COVID-19 infection in animals immunized with NanoFlu/NVX-CoV2373 or with just NVX-CoV2373. Microscopic and macroscopic observations of the lungs showed no remarkable findings in animals immunized with either the combination vaccine or with NVX-CoV2373 alone.

    "Seasonal influenza and COVID-19 combination vaccines will likely be critical to combating emerging COVID-19 variants," said Russell 'Rip' Wilson, Executive Vice President and NanoFlu General Manager, Novavax. "Millions of people are affected by influenza each year in the U.S., and despite our vaccination efforts, currently available flu vaccines are only partially effective. Our NanoFlu vaccine Phase 3 clinical trial achieved all of its primary endpoints, and we expect this combination vaccine will help control both COVID-19 and influenza illness."

    About NVX-CoV2373
    NVX-CoV2373 is a protein-based vaccine candidate engineered from the genetic sequence of the first strain of SARS-CoV-2, the virus that causes COVID-19 disease. NVX-CoV2373 was created using Novavax' recombinant nanoparticle technology to generate antigen derived from the coronavirus spike (S) protein and is adjuvanted with Novavax' patented saponin-based Matrix-M to enhance the immune response and stimulate high levels of neutralizing antibodies. NVX-CoV2373 contains purified protein antigen and can neither replicate, nor can it cause COVID-19. In preclinical studies, NVX-CoV2373 induced antibodies that blocked the binding of spike protein to cellular receptors and provided protection from infection and disease. It was generally well-tolerated and elicited robust antibody response in Phase 1/2 clinical testing.

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    Novavax Announces Positive Preclinical Data for Combination Influenza and COVID-19 Vaccine Candidate - Seite 2 - Manuscript highlights development of robust responses to both influenza and COVID-19 and protection against the SARS-CoV-2 virus - Data shared via preprint server for biology, bioRxiv, ahead of publication GAITHERSBURG, Md., May 10, 2021 …