ClinicalTrials.gg
RecruitingNCT07449091Updated May 15, 2026

Adaptability of an Undetectable = Untransmissible Model for HBV

An observational study in Chronic Hepatitis b and Viremia, sponsored by NYU Langone Health. Recruiting at 1 site in United States. Open to participants aged 18 Years to 65 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-05-15.

Sponsored by NYU Langone Health · Observational

From the registry’s dates

  • Started May 2026; still recruiting 6 months later.
Study type
Observational
Model
Cohort
Time perspective
Cross-sectional
Enrollment
55
Ages
18 Years to 65 Years
Sex
All
01

Study summary

Persons with chronic hepatitis B (HBV) infection and active viremia are infectious and may transmit virus to others through blood/body fluid exposure. Immune tolerant treatment naive persons with hepatitis B infection express anxiety regarding disclosure of their infection status and significant fear of transmission to their partners leading to social isolation and impact on their personal lives. This study will provide data correlating serum and body fluid viral levels in persons with chronic hepatitis B infection not on therapy and those with viral suppression on long-term anti-retroviral therapy (ART) that may support the concept of "Undetectable=Untransmissible" (U=U) in patients with chronic hepatitis B.

02

Conditions studied

  • Chronic Hepatitis b
  • Viremia
03

In context

Hepatitis B, Chronic

895 studies on the registry are indexed under Hepatitis B, Chronic; 151 are open to participants now.

This study's planned enrollment of 55 is below the median of 400 across 206 observational studies indexed under Hepatitis B, Chronic.

Browse Hepatitis B, Chronic studies →

Lead sponsor

NYU Langone Health is the lead sponsor of 1,430 studies on the registry; 258 are open to participants now.

Of its 235 completed or terminated interventional studies of FDA-regulated products, 197 (84%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 65 Years
Sexes eligible
All
Accepts healthy volunteers
Yes
Sampling method
Non-probability sample

Study population

Persons with chronic hepatitis B infection and active viremia

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.

Inclusion criteria

Infected Individuals

  • Individuals above 18 years and less than 65 years with chronic infection
  • Included according to undermentioned three arms:

    • Infected, On-treatment arm: subjects being treated with TAF/TDF for a minimum of 2 years with sustained viral suppression indicating adherence to therapy
    • Infected, Untreated control arm: Immune tolerant subjects; 15 with high viral load (>10\^6) and 5 with low viral load (\<10\^6)
    • Uninfected Assay Validation controls: 10 subjects with history of prior infection who have convalesced i.e., have lost surface antigen, and developed surface antibody with viral eradication
  • Able and willing to provide

Healthy Controls

  • Individuals above 18 years and less than 65 years who have never been infected and have been vaccinated
  • Able and willing to provide informed consent

Exclusion criteria

Exclusion Criteria:

  • Individuals less than 18 years or greater than 65 years of age
  • Prior surgery to genitourinary tract, including prior vasectomy
  • Prior interferon therapy
  • co-infection
  • virus co-infection
  • Hepatitis delta virus co-infection
Terms in these criteria, in plain language(4)

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.

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.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Hepatitis C tests

Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.

After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.

05

Study design

Observational model
Cohort
Time perspective
Cross-sectional
Enrollment
55 participants (estimated)
Patient registry
No

Groups and cohorts

  • Anti-Viral Therapy

    Infected individuals on anti-viral therapy.

  • No Therapy

    Infected individuals who are not receiving anti-viral therapy.

  • Convalesced

    Individuals who have cleared HBV infection.

  • Healthy Controls

    Individuals who are uninfected.

06

What researchers measure

Primary outcomes

  1. Percentage of Individuals with Detectable HBV DNA

    Assessed among those who have achieved viral supression.

    Time frame: Up to Month 6

  2. HBV DNA Levels

    Assessed among those with detectable HBV DNA.

    Time frame: Up to Month 6

07

Study locations

1 of 1 sites recruiting
08

References and documents

Individual participant data

Plan to share: Yes — The de-identified participant data from the final research dataset will be shared upon reasonable request beginning 9 to 36 months after publication or as required by a condition of awards or supporting agreements, provided the requesting investigator executes a data use agreement with NYU Langone Health. This instance of data sharing will also require separate IRB review as well as review from NYU Langone's Data Sharing Strategy Board (DSSB). Requests should be directed to: AnnMarie.Liapakis@nyulangone.org. The protocol and statistical analysis plan will be posted on Clinicaltrials.gov only as required by federal regulation or supporting awards and agreements.

Supporting information: Study protocol, Statistical analysis plan

Time frame: Beginning 9 months and ending 36 months following article publication or as required by a condition of awards and agreements supporting the research.

Access criteria: The investigator who proposed to use the data will be granted access upon reasonable request. Requests should be directed to AnnMarie.Liapakis@nyulangone.org. To gain access, data requestors will need to sign a data access agreement. This instance of data sharing will also require separate IRB review as well as review from NYU Langone's DSSB.

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Started May 2026 (actual). Primary completion is estimated for Sep 2027, 16 months after the start.

How these figures are worked out, and which studies are left out of them.

Registered
Feb 27, 2026
First posted
Mar 4, 2026
StartActual
May 1, 2026
Primary completionEst.
Sep 2027
CompletionEst.
Sep 2027
Last update
May 15, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on May 15, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT07449091
Lead sponsor
NYU Langone Health
Collaborators
Gilead Sciences
Responsible party
Sponsor
First posted
Mar 4, 2026
Start date
May 1, 2026
Primary completion
Sep 2027 (estimated)
Completion
Sep 2027 (estimated)
Last update
May 15, 2026

Study contacts

AnnMarie Liapakis, MD
Contact
AnnMarie.Liapakis@nyulangone.org
212-263-3751
AnnMarie Liapakis, MD
principal investigator · NYU Langone Health

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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