References UK clinical guidance from the NHS, the British HIV Association (BHIVA), and the British Association for Sexual Health and HIV (BASHH). Last updated: April 2026.
Home hepatitis B test kits let you check for the virus discreetly, either with a finger-prick blood sample posted to a lab or with a rapid self-test. They are a useful tool for people who want to know their status without visiting a clinic. Understanding what the tests detect, and what the results mean, helps you use them effectively.
Here’s a practical guide.
Order a discreet home STI test
What Hepatitis B Tests Detect
There are several markers of hepatitis B infection. Different tests check for different things:
| Marker | What It Means |
|---|---|
| HBsAg (surface antigen) | Current infection (acute or chronic) |
| Anti-HBc (core antibody) | Past or current exposure |
| Anti-HBs (surface antibody) | Immunity (from vaccination or past cleared infection) |
| HBeAg (e antigen) | High infectivity (if positive) |
| HBV DNA (viral load) | How actively the virus is replicating |
Most home tests check for HBsAg — the marker of current infection.
Types of Home Test
- Postal kits — finger-prick blood sample sent to a lab for analysis
- Rapid self-tests — results at home in 15-20 minutes
- Comprehensive STI panels — some cover hepatitis B alongside HIV, syphilis and others
Who Should Test
- People from countries with high hepatitis B prevalence
- Anyone who has ever injected drugs
- People with HIV or other blood-borne infections
- Sexual partners of people with hepatitis B
- Men who have sex with men
- People with unexplained liver problems
- Anyone who had a blood transfusion before screening was introduced
- Healthcare workers and their contacts
What Your Result Means
Negative HBsAg
No current infection. You may still have been exposed in the past — a comprehensive test including core antibody and surface antibody would show this.
Positive HBsAg
You have a current hepatitis B infection. You need clinical follow-up to determine whether it is acute (recent) or chronic (long-standing), and whether treatment is needed. Contact a sexual health or liver clinic.
Reactive but indeterminate
Needs confirmation with a laboratory test. Don’t panic — false positives occur, especially with rapid tests.
After a Positive Result
- Contact a sexual health clinic or your GP
- Confirmation testing with full hepatitis B panel and viral load
- Liver function tests
- Assessment for treatment
- Partner notification and testing
- Vaccination for household contacts
Treatment Overview
Chronic hepatitis B is treated with antiviral drugs that suppress the virus and reduce liver damage. Tenofovir and entecavir are the main drugs used. Treatment usually continues long-term. Some people achieve functional cure (loss of HBsAg) but this is uncommon.
Prevention
If your test is negative and you’re at risk, consider vaccination. The hepatitis B vaccine is highly effective and free on the NHS for at-risk adults.
Read more: Hepatitis B and HIV | Hepatitis B and C introduction | Can you die from hepatitis B?
Frequently Asked Questions
Can home hepatitis B tests detect past infection?
Only if the test includes core antibody (anti-HBc). Most basic tests only check for HBsAg, which shows current infection.
How accurate are home hepatitis B tests?
Lab-processed postal kits are highly accurate. Rapid self-tests are less sensitive, especially during early infection.
Should I be vaccinated if my test is negative?
If you’re at ongoing risk, yes. The hepatitis B vaccine is highly effective and recommended for people with sexual or bloodborne risk factors.
Related reading
- Blood Test for Syphilis, Hepatitis B and Hepatitis C
- Hepatitis B Core Antibody Test Explained
- Hepatitis C Testing: A Complete Guide
- Can You Die From Hepatitis B?
- Can You Have Chlamydia and Test Negative?
Sources
- NHS — Sexual health conditions
- BASHH — UK clinical guidelines for STI management
- British HIV Association (BHIVA) — HIV treatment guidelines
- Terrence Higgins Trust — sexual health information
- UK Health Security Agency — STI surveillance data
Steve Page is a recognised expert on Sexually Transmitted Diseases (STDs) and STD treatments, having published numerous articles in peer-reviewed journals and presented his research at conferences around the world. He has an in-depth understanding of the latest medical research on STDs, and is an advocate for the development of new treatments and protocols to improve the health of those affected. In addition to his research, he has dedicated his career to understanding the causes and symptoms of STDs, as well as how to best treat those impacted.
