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Hepatitis BNovember 2023Summary reviewed July 2026

What the HBV001 Study Found — ChAdOx1-HBV Vaccine for Chronic Hepatitis B

Researchers tested a new vaccine called ChAdOx1-HBV in people with chronic hepatitis B and healthy volunteers. The vaccine was safe and triggered immune responses against the virus, though responses were stronger in healthy people than in those with chronic infection.

What the trial was testing

The HBV001 enrolled 47 patients with hepatitis b. The study was sponsored by Barinthus Biotherapeutics and tracked outcomes across the full group of patients who matched the trial's eligibility profile.

It was an early-stage trial — researchers are still confirming safety and getting an early look at how well the treatment works. Trials at this stage are designed to produce evidence regulators and physicians can act on — not just observations to follow up later.

What the results showed

The vaccine triggered strong immune responses in healthy volunteers and detectable responses in chronic hepatitis B patients.

JHEP reports : innovation in hepatology · 2023 · NCT04297917

These findings — that the vaccine activated the immune system to recognize all major hepatitis B virus proteins — were published in the JHEP reports : innovation in hepatology and represent the headline result of the study.

Researchers tracked outcomes across 47 patients enrolled in the trial. The result was consistent enough across the group that the team felt confident reporting it.

What this means for patients

For patients with hepatitis b, this result changes the calculus on what to ask their care team about. Whether it changes day-to-day care depends on factors like disease subtype, prior treatments, and where the patient is in their care journey.

What you can do now

This was an early-stage study and the treatment is not yet FDA-approved. The vaccine showed promise but worked better in healthy people than in those with chronic hepatitis B. Researchers plan to combine it with other treatments to improve results. Ask your doctor about open trials or related approved options for hepatitis B.

Eligibility for the treatments mentioned above depends on specific test results and clinical history. Bring this summary, the trial name, and your most recent labs or pathology report to your next visit.

Open hepatitis b trials