Hepatitis B vaccination: protection, duration and checking

The hepatitis B vaccination protects most people against the hepatitis B virus for decades, and probably for life. After the injections your body makes antibodies that neutralise the virus before it reaches your liver. Whether that worked for you is shown by a simple blood test.

Many people no longer know whether they were ever vaccinated, or wonder whether a shot from fifteen years ago still counts. That is a fair question, and it has a concrete answer.

Below you will read what the vaccination does, who gets it in the Netherlands, how long it lasts and how you check for yourself whether you are protected.

What does the hepatitis B vaccination actually do?

The vaccination teaches your immune system to recognise one specific protein of the virus: the surface antigen, abbreviated HBsAg. Your body makes antibodies against it, called anti-HBs. If you meet the real virus later, your defences step in straight away.

The vaccine contains no live virus. So you cannot catch hepatitis B from it, and that is a misunderstanding that keeps circulating.

Hepatitis B passes on through blood, semen, pre-ejaculate and vaginal fluid. The RIVM names unsafe sexual contact and blood contact as the main routes. More on that is in our piece on hepatitis B transmission.

Because the virus is sexually transmissible, it simply counts as an STI. The difference from most other STIs is that you can be vaccinated against this one.

Who gets a hepatitis B vaccination in the Netherlands?

Since 2011 every baby in the Netherlands receives the vaccination through the national immunisation programme, as part of the combined DKTP-Hib-HepB shot. If you were born after 2011, you are almost certainly vaccinated. If you are older, it depends.

On top of that, the GGD offers free vaccination to people at raised risk. The RIVM counts men who have sex with men, sex workers and healthcare staff with a chance of blood contact among those groups.

If you fall outside them, you can still be vaccinated, but you usually pay for it yourself. Whether you qualify is something to discuss with the GGD or your GP. We test, we do not vaccinate.

Pregnant women in the Netherlands are screened for hepatitis B as standard at the first check-up. That happens to prevent the virus passing on during delivery.

How many hepatitis B vaccinations do you need?

A full primary series in adults usually consists of three injections spread over roughly six months. The common schedule is a shot at month zero, one at month one and one at month six. Only after the third is the series complete.

That last point matters more than it seems. People who stop after two shots often have some antibodies, but not the stable protection the full series gives.

For most healthy adults no booster is needed afterwards. Which schedule suits your situation is decided by the doctor giving the vaccination.

How long is a hepatitis B vaccination valid?

Far longer than people think. Research shows protection persists for at least thirty years after a full series, and the WHO therefore advises no routine booster for healthy, adequately vaccinated people. Your measurable antibodies do fall, but that is not the same as losing protection.

That distinction is the heart of this topic. Your immune system remembers the virus, even once the antibodies in your blood have dropped below the detection limit.

Polák and colleagues concluded in 2016 that healthy adults need neither routine titre checks nor boosters. For people with reduced immunity it is different, and there periodic checking does happen.

We go into this further in our piece on how long a hepatitis B vaccination is valid.

How do you check whether the vaccination worked?

With a blood test for anti-HBs, the antibody you make after vaccination. The value is expressed in international units per litre, IU/l. From 10 IU/l upward, protection is the international reading.

That number is the only way to know for certain that your body responded. A vaccination record says you had the shots, not that they took hold in you.

The table below helps you place a result. Treat it as a reading guide, not as a verdict on your situation.

Note what is not in that table. A value below 10 does not automatically mean you are unprotected, because your immune memory can be intact while the antibodies have declined.

An Italian study of 1,030 vaccinated students from 2019 found that even a value above 2 IU/l already predicted a fast, strong response to an extra shot. The antibodies had fallen, the memory had not.

If you want to go deeper into the numbers, read our piece on what your anti-HBs value says. Background on the marker itself is on our anti-HBs page.

What if you do not respond to the vaccination?

That happens in roughly one in ten vaccinated people. That group is called non-responders: people who make no demonstrable antibodies after a full series. It is unwelcome news, but it is known, measurable and discussable.

A German study from 2020 among more than fifteen thousand tested people identified three factors linked to a weaker response. The average age at vaccination was 30.5 years in non-responders against 24 years in responders.

A higher BMI (25.1 against 23.2) and smoking (57.1 percent against 30.8 percent) were also more common among those who did not respond. Those are statistical patterns at group level, not a prediction for you personally.

Anyone who does make antibodies after a second series is simply protected. What is sensible in your case is decided by the doctor who vaccinates you.

What if you have already had hepatitis B?

Then you usually have antibodies too, but of a different type. Someone who caught the infection and cleared it makes anti-HBc alongside anti-HBs, the antibody against the core of the virus. A vaccination does not produce that second antibody.

That difference is useful, because it shows where your protection came from. Anti-HBs without anti-HBc fits vaccination. Anti-HBs together with anti-HBc fits an infection your body cleared on its own.

There is a third outcome, and it sits differently. If the surface antigen HBsAg itself stays detectable, the virus has not been cleared and the infection is called chronic hepatitis B, sometimes described as carrying the virus. What that marker measures is on our HBsAg page.

Laying those three results side by side is a doctor's job. We supply the values with an assessment, the translation to your situation belongs in the consulting room.

What happens after a needlestick incident or a risk contact?

Then speed matters most. After a needlestick incident at work, or unprotected contact with someone who may have hepatitis B, it is usual to contact the occupational doctor, your GP or the GGD straight away. They judge whether extra measures are needed and how quickly.

Knowing whether you are already protected makes an enormous difference at such a moment. Someone with a recorded anti-HBs value above the threshold is in a very different position from someone who simply does not know.

That is exactly why many healthcare workers have their value recorded once and keep it. More on that situation is in our piece on hepatitis B vaccination for work.

And if you do catch hepatitis B?

Most healthy adults clear the virus themselves, usually within six months. If the virus stays detectable after that, the infection is called chronic and treatment comes into view. Such treatment suppresses the virus, which is not the same as removing it entirely.

A doctor decides whether and when treatment makes sense, usually based on repeated blood checks. Not everyone with chronic hepatitis B needs medication straight away, and that often surprises people.

How that path runs is explained in our piece on hepatitis B treatment.

Where can I find my hepatitis B vaccination record?

Vaccinations from the national immunisation programme are registered with the RIVM, and you can request your own data there. Shots you had later at the GGD, a travel clinic or an occupational health service are usually in that body's own records.

In practice such proof goes missing easily, certainly when it is decades old. If you have moved or changed GP, the paper trail is often dead.

A blood test is then the shortest route. You are not measuring what was once written down, but what is in your blood now.

What are the side effects of the hepatitis B vaccination?

Usually mild and short-lived. The most commonly reported complaints are a sore or red spot at the injection site, some fatigue and sometimes a headache. Those generally clear up by themselves within a few days.

Serious reactions are rare. If you are unsure about a complaint after a shot, discuss it with the doctor or service that gave the vaccination.

We describe here what is generally known. There is more in our piece on hepatitis B vaccination side effects.

Does the vaccination also protect against hepatitis A or C?

No. The hepatitis B vaccination works only against the hepatitis B virus. There is a separate vaccine for hepatitis A, and for hepatitis C there is no vaccine at all.

That means a valid hepatitis B vaccination tells you nothing about the other two. They are also transmitted somewhat differently.

We explain the difference between the variants in our piece on hepatitis B and C. If you want to be checked for several variants at once, the hepatitis screening looks wider than protection alone.

If you would rather be seen anonymously and without a referral, our piece on the hepatitis test describes how that works in practice.

Two men, the same result

Take two men of 34 who both have an anti-HBs value of 4 IU/l measured. Identical on paper, both under the threshold of 10. Yet they stand in completely different places.

The first had the full series as a baby through the national immunisation programme. His antibodies have faded over thirty-odd years, but his immune memory is still there, and it springs into action the moment the virus turns up.

The second was never vaccinated and never had the infection either. His 4 IU/l is noise, not protection.

I think this is the strongest argument against reading one number in isolation. The same value, two entirely different stories, and only the vaccination history separates them. That is why a low result calls for context rather than panic.

When a test beats an assumption

There is one situation where doubt really costs you: believing you are protected when you are not. That applies especially to work involving blood contact, to a needlestick incident, or to changing sexual partners.

In those cases an anti-HBs measurement is not a luxury. It is the difference between hoping and knowing.

We think you should be able to get that clarity without a detour, without a conversation first and without it landing in your insurer's file. The hepatitis test gives that insight. Always discuss an unusual result with your GP.

References

• RIVM. Hepatitis B. 2025. rivm.nl
• World Health Organization. Hepatitis B fact sheet. 2026. who.int
• Polák P, Husa P, Smejkal P, et al. Is it necessary to revaccinate against hepatitis B virus when the titer of anti-HBs drops below 10 IU/L? Klin Mikrobiol Infekc Lek. 2016. PMID 27907975.
• Significance of anti-HB levels below 10 IU/L after vaccination against hepatitis B in infancy or adolescence. Hum Vaccin Immunother. 2019. PMID 31487228.
• A simple clinical score to identify likely hepatitis B vaccination non-responders. BMC Infect Dis. 2020. PMID 33238923.

Every blood test result at Discreet Test includes a professional assessment by a BIG-registered doctor. For treatment decisions, discuss your results with your GP.