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GSK's Chronic Hepatitis B Therapy Shows Promise in Key ...
Bepirovirsen showed significantly higher functional cure rates in global Phase 3 trials with 1,800 patients, offering a potential six-month finite therapy for chronic hepatitis B.
On January 7, 2026, GSK announced positive Phase 3 results from B-Well 1 and B-Well 2 trials, which met their primary endpoint showing a significant functional cure rate for bepirovirsen.
CHB remains a major global health challenge, affecting more than 250 million people worldwide and linked to around 1.1 million deaths annually; achieving a functional cure is critical.
The Phase 3 trials enrolled over 1,800 patients across 29 countries, with bepirovirsen given as a weekly subcutaneous injection over a six-month course, achieving higher cure rates and good safety.
If approved, bepirovirsen could become the first finite six-month therapy and GSK projects peak sales of around �2 billion, while Ionis could receive $150 million in milestone payments and 10-12% royalties.
Detailed trial data remain unpublished, and full clinical results will be presented at a scientific congress and published in a peer-reviewed journal; GSK is also following patients in the B-Sure long-term extension study that will run for around three years.