09:14 AM EDT, 06/11/2025 (MT Newswires) -- Health care stocks were higher premarket Wednesday, with the Health Care Select Sector SPDR Fund ( XLV ) up 0.1% and the iShares Biotechnology ETF (IBB) up 0.7%.

Vaxart ( VXRT ) shares rose 51% after the clinical-stage company reported topline results from an early-stage clinical study comparing its oral pill norovirus vaccine constructs to its first-generation constructs. The company said second-generation norovirus constructs resulted in statistically significant increases in norovirus blocking antibodies when compared to first-generation constructs.

Cabaletta Bio ( CABA ) shares declined 15% after the company launched an underwritten public offering of shares and accompanying warrants.

Novavax ( NVAX ) said results from initial cohort of its late-stage trial showed its COVID-19-influenza combination and stand-alone flu vaccine candidates produced immune responses comparable to licensed products Nuvaxovid and Fluzone HD, respectively. The company's shares rose 1.2%.