Novavax’s Covid-Flu Combo, Standalone Flu Vaccines Demonstrate Robust Immune Response In Late-Stage Trial: Retail Says It’s ‘A Very Good Sign’

Both candidates were well tolerated, with nearly all adverse events identified as mild or moderate.
In this photo illustration a covid-19 vaccine is seen with the Novavax logo in the background. (Photo Illustration by Nikos Pekiaridis/NurPhoto via Getty Images)
In this photo illustration a covid-19 vaccine is seen with the Novavax logo in the background. (Photo Illustration by Nikos Pekiaridis/NurPhoto via Getty Images)
Profile Image
Anan Ashraf·Stocktwits
Updated Jul 02, 2025 | 8:31 PM GMT-04
Share this article

Novavax, Inc. (NVAX) on Wednesday said that its COVID-19-Influenza combination and stand-alone Influenza vaccine candidates demonstrated a robust immune response in an initial cohort of a late-stage trial.

The cohort was designed to provide data on three flu strains and COVID-19 to inform a future registrational late-stage program. The company said both vaccine candidates induced immune responses similar to those of licensed comparators Nuvaxovid and Fluzone HD.

Both candidates were well tolerated, with nearly all adverse events identified as mild or moderate.

Novavax said that it continues to pursue partnering opportunities to advance further development of these programs.

The company received the U.S. Food and Drug Administration’s approval for its COVID-19 vaccine Nuvaxovid last month. The company expects Nuvaxovid to be available for commercial use this fall.

Novavax rival Moderna (MRNA), meanwhile, withdrew its application to the FDA for approval of its seasonal flu-COVID combination vaccine candidate late last month.

Moderna said it will resubmit the application later this year after data from its ongoing late-stage trial of its seasonal flu vaccine is available.

On Stocktwits, retail sentiment around Novavax stayed unmoved within the ‘bearish’ territory over the past 24 hours while message volume remained ‘low.’

NVAX's Sentiment Meter and Message Volume as of 8:00 a.m. ET on Jun 11, 2025 | Source: Stocktwits
NVAX's Sentiment Meter and Message Volume as of 8:00 a.m. ET on Jun 11, 2025 | Source: Stocktwits


A Stocktwits user expressed optimism about the new data, terming it a “very good sign” that the company will continue to make the best vaccines for COVID-19 and flu, as well as for a combination of both.


NVAX stock is trading 1% higher in pre-market session. The stock is down by about 16% this year and by about 57% over the past 12 months.

Read Next: Polestar To Resume Expansion Into New Markets With France, Says Report: Retail’s Still Skeptical

For updates and corrections, email newsroom[at]stocktwits[dot]com.

Subscribe to The Litepaper
All Newsletters
Get the daily crypto email you’ll actually love to read. It's value-packed, data-driven, and seasoned with wit.
Read about our editorial guidelines and ethics policy