Novavax preps late-stage trial as COVID-flu combo vaccine matches rivals

12 June 2025

US biotech Novavax (Nasdaq: NVAX) has reported that its experimental combination COVID-19 and influenza vaccine generated immune responses on par with approved shots in a descriptive Phase III trial involving older adults. The company said the results would help shape a future registrational study.

The Gaithersburg, Maryland-based firm tested its COVID-19-influenza combination (CIC) candidate and a standalone flu shot against its own COVID-19 vaccine, Nuvaxovid (NVX-CoV2373), and Sanofi’s (Euronext: SAN) Fluzone HD.

The study was not designed to demonstrate statistical significance but rather to guide the development of a future Phase III trial that could support regulatory submission. The data also follow promising signals from a previous Phase II trial.

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