A Phase 2 interventional study of VIR-2218 and VIR-3434 in Hepatitis D, Chronic, sponsored by Vir Biotechnology, Inc.. Active, not recruiting at 20 sites in 9 countries. Open to participants aged 18 Years to 69 Years. Per ClinicalTrials.gov, last updated 2026-06-26.
Sponsored by Vir Biotechnology, Inc. · Phase 2, Interventional, and Treatment
This is a phase 2 trial in which participants with chronic hepatitis D virus (HDV) infection will receive VIR-2218 and/or VIR-3434 and be assessed for safety, tolerability, and efficacy
Participants may be enrolled into Cohort 1 (1a and 1b) or Cohort 2 (2a, 2b1 or 2b2, 2c), 3, 4, and 5. All participants still receiving VIR-2218 or VIR-3434 monotherapy at the time of implementation of Protocol Amendment 4 will switch to combination therapy at Week 132 (Cohort 2a, 2b1/2b2) or Week 112 (Cohort 3).
43 studies on the registry are indexed under Hepatitis D, Chronic; 9 are open to participants now.
This study's enrollment of 95 is above the median of 46 across 30 interventional studies indexed under Hepatitis D, Chronic.
Browse Hepatitis D, Chronic studies →Vir Biotechnology, Inc. is the lead sponsor of 22 studies on the registry; 2 are open to participants now.
Of its 15 completed or terminated interventional studies of FDA-regulated products, 11 (73%) have results posted.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.
“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.
The other ingredients in a medicine besides the active drug, such as fillers, colours or preservatives.
A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.
Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
ALT and AST (liver enzymes)
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ULN (upper limit of normal)
The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.
“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Clinically significant
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis B tests
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hypersensitivity
An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Excipients
The other ingredients in a medicine besides the active drug, such as fillers, colours or preservatives.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Autoimmune disease
A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.
Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Corticosteroids (steroids)
Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.
Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Participants will receive multiple doses of VIR-2218 for up to 96 weeks total.
Drug: VIR-2218
Participants will receive multiple doses of VIR-3434 for up to 96 weeks total.
Drug: VIR-3434
Participants will receive multiple doses of VIR-2218 for up to 132 weeks, then assign to Cohort 2c.
Drug: VIR-2218
Participants will receive multiple doses of VIR-3434 for up to 132 weeks, then assign to Cohort 2c.
Drug: VIR-3434
Participants will receive multiple doses of VIR-3434 for up to 132 weeks, then assign to Cohort 2c.
Drug: VIR-3434
Participants will receive multiple doses of VIR-2218 + VIR-3434 for up to 336 weeks.
Drug: VIR-2218 · Drug: VIR-3434
Participants will receive multiple doses of VIR-3434 for up to 112 weeks, then assign to Cohort 2c.
Drug: VIR-3434
Participants will receive NRTI for 12 weeks, then assign to Cohort 2c or Cohort 3.
Drug: NRTI
Participants will receive multiple doses of VIR-2218 for 12 weeks, then assign to Cohort 2c.
Drug: VIR-2218
Proportion of participants with undetectable HDV RNA (< limit of detection [LOD]) or ≥ 2 log10 decrease in HDV RNA from baseline and alanine aminotransferase (ALT) normalization (ALT < upper limit of normal [ULN]) at Week 24
Time frame: Up to 24 Weeks
Treatment-emergent adverse events (TEAEs) and serious adverse events (SAEs)
Time frame: Up to 360 Weeks
Proportion of participants with undetectable HDV RNA (less than LOD) or greater than/equal to 2 log10 decrease in HDV RNA from baseline and ALT normalization at Week 12, Week 48, Week 72, Week 96, Week 144, Week 192, Week 240, Week 288, and Week 336.
Time frame: Up to 336 Weeks
Proportion of participants with undetectable HDV RNA (less than LOD) or greater than/equal to 2 log10 decrease in HDV RNA from baseline at Week 12, Week 24, Week 48, Week 72, Week 96, Week 144, Week 192, Week 240, Week 288, and Week 336.
Time frame: Up to 336 Weeks
Proportion of participants with undetectable HDV RNA (less than LOD) at Week 12, Week 24, Week 48, Week 72, Week 96, Week 144, Week 192, Week 240, Week 288, and Week 336.
Time frame: Up to 336 Weeks
Proportion of participants with HDV RNA < lower limit of quantitation (LLOQ) at Week 12, Week 24, Week 48, Week 72, Week 96, Week 144, Week 192, Week 240, Week 288, and Week 336.
Time frame: Up to 336 Weeks
Change from baseline in HDV RNA at Week 12, Week 24, Week 48, Week 72, Week 96, Week 144, Week 192, Week 240, Week 288, and Week 336.
Time frame: Up to 336 Weeks
Proportion of participants with ALT normalization at Week 12, Week 24, Week 48, Week 72, Week 96, Week 144, Week 192, Week 240, Week 288, and Week 336.
Time frame: Up to 336 Weeks
Incidence of anti-drug antibodies (ADA) and titers of ADA to VIR-3434 at specified study visits up to Week 336 (for cohorts with VIR3434)
Time frame: Up to 336 Weeks
Change from baseline in liver fibrosis at Week 48, Week 96, Week 144, Week 192, Week 240, Week 288, and Week 336.
Liver Fibrosis will be measured by conventional Transient Elastography imaging technique reported in kPa.
Time frame: Up to 336 Weeks.
Change from baseline in Model for End Stage Liver Disease (MELD) score at Week 12, Week 24, Week 36, Week 48, Week 60, Week 72, Week 84, Week 96, Week 144, Week 192, Week 240, Week 288, and Week 336.
MELD score will be calculated using serum bilirubin, serum creatinine, and International Normalized Ratio.
Time frame: Up to 336 Weeks
Change from baseline in Child-Pugh-Turcotte (CPT) score at Week 24, Week 48, Week 72, Week 96, Week 144, Week 192, Week 240, Week 288, and Week 336.
Time frame: Up to 336 Weeks
Plan to share: No
Started Sep 2022 (actual). Primary completion is estimated for Nov 2031, 110 months after the start.
How these figures are worked out, and which studies are left out of them.
This study is active, not recruiting, as verified in Jun 2026. You cannot join it, but the record below documents what was studied.
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