DGAP-News: One Year Follow-Up From RSV F-Protein Vaccine

DGAP-News: Novavax, Inc. / One Year Follow-Up From RSV F-Protein Vaccine Candidate Phase 1 Elderly Trial Demonstrates Sustained Levels of Immune Response 12.05.2014 / 15:09 --------------------------------------------------------------------- -- Sustained levels of RSV F antibody and palivizumab-competing antibody responses demonstrated over a 4 to 6 month period -- Results support accelerating development plans for 'seasonal' elderly RSV vaccine -- Phase 2 clinical trial in elderly anticipated to start in late-2014/early-2015 GAITHERSBURG, Md., May 12, 2014 (GLOBE NEWSWIRE) -- Novavax, Inc. (Nasdaq:NVAX) today announced follow-up data from its dose-ranging Phase 1 clinical trial of its respiratory syncytial virus (RSV) F-protein vaccine in 220 elderly adults (60 years of age and older, with a mean age of 68) that was initiated in October 2012. In the placebo-controlled trial, subjects received a single injection of either 60ug or 90ug of the RSV F-protein vaccine candidate, with or without aluminum phosphate as an adjuvant. Positive top-line interim safety and immunogenicity data released by Novavax in July 2013 described antibody responses 28 and 56 days post-immunization. Overall immune responses were greater in groups receiving the 90mug dose compared to the groups dosed with 60ug. Also, robust anti-F IgG responses and palivizumab competing antibody (PCA) responses were observed in all vaccine recipients. Notably, by day 56, subjects receiving the 90mug dose without adjuvant achieved PCA responses at a geometric mean of 142mug/ml, which approximate the peak levels seen in pharmacokinetics trials of palivizumab in infants receiving repeat palivizumab injections (~150ug/ml) and exceeded trough levels seen (~70ug/ml) in those same studies, indicating that the vaccine induced antibody levels that are likely to be protective. In the one-year follow up data released by Novavax today, the company reported that the group receiving the 90mug dose without adjuvant, anti-F levels and PCA were significantly elevated over baseline at day 118, with a geometric mean of 130mug/ml, and at day 180, with a geometric mean of 114mug/ml. For the same group, at day 180, anti RSV A neutralizing antibodies were log2 8.8 and RSV B neutralizing antibodies were log2 9.0, both considered protective levels in seroepidemiology studies. 'Typically, RSV season lasts four to five months, so it was important to see follow-up data which support that our vaccine could be protective across a full RSV season, similar to seasonal influenza vaccination. Our data suggest that, since protective levels are diminished at day 365, annual boosts of our vaccine may be warranted,' said Dr. Gregory Glenn, Senior Vice President of Research and Development at Novavax. 'The monoclonal antibody palivizumab has been shown to protect infants against severe RSV disease but has only a 21-day half-life and is therefore given in multiple injections to sustain protective levels. A single dose of our RSV F vaccine candidate appears to sustain immunity in the elderly at levels that exceed what was protective in infants, and does so over a long-enough period of time to cover an entire RSV season.' Stan Erck, President and CEO of Novavax, stated, 'We were pleased to see that a 90mug dose of our RSV F vaccine candidate was immunogenic and sustained levels that appear to be protective over an entire RSV season. These results encourage us to accelerate our development plans to include an annual seasonal RSV vaccine for the elderly where there is a burden of disease and incidence rate similar to that of an influenza virus, and clearly support initiation of a Phase 2 clinical trial as early as later this year or early-2015. About RSV RSV is a major respiratory pathogen in infants, children, and adults. RSV infections in adults represent re-infections and are generally mild to moderate in severity, except in persons with high-risk conditions including the elderly and adults with underlying chronic cardiac or pulmonary disease. It is estimated that between 11-17,000 adults die of RSV infection annually in the U.S., with and up to 180,000 admitted to hospital with respiratory symptoms. Currently, there is no approved RSV prophylactic vaccine available. Palivizumab is a monoclonal antibody, licensed and sold by Medimmune as Synagis(r), that targets the RSV F protein and is used for prophylaxis against RSV disease in high risk infants. About Novavax Novavax, Inc. (Nasdaq:NVAX) is a clinical-stage biopharmaceutical company creating novel vaccines and vaccine adjuvants to address a broad range of infectious diseases worldwide. Using innovative proprietary recombinant protein nanoparticle vaccine technology, the company produces vaccine candidates to efficiently and effectively respond to both known and newly emergent diseases. Additional information about Novavax is available on the company's website, novavax.com. Forward-Looking Statements Statements herein relating to the future of Novavax and the ongoing development of its vaccine and adjuvant products are forward-looking statements. Novavax cautions that these forward looking statements are subject to numerous risks and uncertainties, which could cause actual results to differ materially from those expressed or implied by such statements. These risks and uncertainties include those identified under the heading 'Risk Factors' in the Novavax Annual Report on Form 10-K for the year ended December 31, 2013, and filed with the Securities and Exchange Commission (SEC). Investors are cautioned not to place considerable reliance on the forward-looking statements contained in this press release. You are encouraged to read company filings with the SEC, available at sec.gov, for a discussion of these and other risks and uncertainties. The forward-looking statements in this press release speak only as of the date of this document, and the company undertakes no obligation to update or revise any of the statements. The company's business is subject to substantial risks and uncertainties, including those referenced above. Investors, potential investors, and others should give careful consideration to these risks and uncertainties. CONTACT: Barclay A. Phillips SVP, Chief Financial Officer and Treasurer Novavax, Inc. 240-268-2000 News Source: NASDAQ OMX End of Corporate News --------------------------------------------------------------------- 12.05.2014 Dissemination of a Corporate News, transmitted by DGAP - a company of EQS Group AG. The issuer is solely responsible for the content of this announcement. DGAP's Distribution Services include Regulatory Announcements, Financial/Corporate News and Press Releases. Media archive at www.dgap-medientreff.de and www.dgap.de --------------------------------------------------------------------- Language: English Company: Novavax, Inc. United States ISIN: US6700021040 End of News DGAP News-Service --------------------------------------------------------------------- 267874 12.05.2014