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GSK to advance mRNA flu vaccine to late-stage trial

By Thomson Reuters Sep 1, 2026 | 1:14 AM

Sept 1 (Reuters) – GSK said on Tuesday it will advance its mRNA-based seasonal influenza vaccine candidate ​to a late-stage trial after ‌mid-stage data showed it generated stronger immune responses than currently approved standard- and high-dose shots in younger and ‌older ​adults.

The British drugmaker ⁠said it would be ⁠the first late-stage trial of an mRNA flu vaccine designed to target two key surface proteins, ​haemagglutinin and neuraminidase, an approach GSK said could improve ⁠protection and reduce ⁠transmission.

In August, Moderna had won ​U.S. approval for its mFlusiva, the ​first mRNA-based vaccine for seasonal ‌flu, for people aged 50 and older.

The move comes as part of GSK’s plans to start ⁠25 late-stage studies by the end of 2026, following a portfolio review by ⁠CEO Luke ‌Miels aimed at speeding ⁠up drug development ahead ​of ‌looming patent cliffs.

GSK intends ​to begin ⁠the late-stage trial for the mRNA flu vaccine candidate this month.

(Reporting by Raechel Thankam Job in Bengaluru; Editing by Sherry Jacob-Phillips and ​Sonia Cheema)