Medical Oncologist
Before you start
Hepatitis and HIV screening before chemotherapy
Because chemotherapy lowers immunity, and an infection sitting quietly for years can become active once it does. Hepatitis B in particular can flare during treatment and damage the liver, and that flare is largely preventable if it is known about in advance. The test is done for everybody, not because of anything about you.
NG
Medically reviewed by Dr. Naresh GunduConsultant Medical Oncologist · MBBS, DNB (Internal Medicine), DM (Medical Oncology, AIIMS) · last reviewed September 2026, next review due September 2027
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The short answer
Why do they test for hepatitis and HIV before chemotherapy?
Because chemotherapy lowers immunity, and an infection that has been sitting quietly for years can become active once it does. Hepatitis B in particular can flare during treatment and damage the liver badly, and that flare is largely preventable if it is known about in advance.
The test is done for everybody starting treatment. It is not prompted by anything about you, your history or your circumstances, and the staff asking for it are following a standard list rather than making a judgement about your life.
A positive result almost never stops treatment
It changes how treatment is given rather than whether. Preventive medicine, closer monitoring of the liver, and sometimes an adjustment to the plan. People are treated successfully every day with these infections already present.
Finding it now is the good outcome
Many people carry hepatitis B without ever knowing. Learning about it before treatment means it can be covered from the start. Learning about it halfway through, because the liver figures have climbed, is a far worse position to be in.
If you have ever been told you had jaundice, hepatitis or a liver problem, say so now even if it was decades ago.What is tested
What each part of the screen looks for
- Hepatitis B
- The most important one for chemotherapy. Several markers are checked together, because they distinguish a current infection from a past one that the body has controlled. Even a past infection matters here, since it can reactivate.
- Hepatitis C
- Checked because it also affects the liver and changes how some drugs are handled. It is now treatable in its own right, which is worth knowing if the result is positive.
- HIV
- Checked because it affects immunity and because some cancer drugs and HIV medicines interact. People with HIV receive full cancer treatment; the two teams simply need to work together.
- Tuberculosis, sometimes
- Past or latent tuberculosis can reactivate when immunity falls, particularly with certain treatments. Whether this is tested depends on your plan and your history.
- The liver blood tests alongside
- Bilirubin, SGOT and SGPT are checked at the same time, so there is a clear baseline to compare against if anything changes during the course.
- All of it from one sample
- These are drawn with the other pre-treatment bloods rather than as a separate appointment. The results usually take a little longer than the routine tests.
Not sure whether this applies to you?
Ask an oncologistIf a result is positive
What actually happens next
In nearly every case, the answer is that treatment goes ahead with something added, not that it is withdrawn.
Preventive medicine is started
For hepatitis B, an antiviral tablet is usually begun before chemotherapy and continued for a period afterwards. This is the standard approach and it is what prevents the flare.
Ask about
- When it starts, and how long it continues
- Whether it is covered by your scheme
The liver is watched more closely
More frequent blood tests through the course, so any change is caught on a routine check rather than when someone becomes unwell. Do not skip these even when you feel completely fine.
A second specialist joins
A liver specialist for hepatitis, or an HIV physician. Give each team the other's contact details, since the commonest problem is two doctors each assuming the other is managing it.
Make sure
- One doctor holds the whole picture
- You know who to call with questions
Family may be offered testing
For hepatitis B, close family members can be tested and vaccinated. This is offered as protection for them, not as an accusation about anyone, and it is worth accepting.
The part people worry about most
Who gets told, and what you can ask for
Your results belong to you. The medical team treating you needs them, and beyond that you can ask who else is told. If you would rather a particular relative did not know, say so plainly to the doctor rather than hoping it is understood.
Ask for the result privately
You are entitled to receive it without the whole family in the room. It is a reasonable request and staff deal with it routinely. Ask at the time of the test rather than after the result has arrived.
Ask what will be written where
If you are worried about a result appearing on an insurance form or a discharge summary that others read, ask directly what is recorded and who sees it. A clear answer is better than a private worry.
The stigma is real, and it is not a reason to refuse
People decline these tests because of what a positive result might mean socially, particularly for an unmarried person or a young woman. Understandable, and still the wrong decision: an undetected hepatitis B flare during chemotherapy is a serious liver problem, and it is one of the few genuinely preventable disasters in this whole pathway.
Nobody is going to interrogate you
These infections are acquired in many ways, including at birth, through transfusions and through medical procedures long ago. The team's interest is entirely in protecting your liver during treatment, not in how it got there.
If you would like the conversation without relatives present, ask for a few minutes alone with the doctor.Leave a number, we will call you
One field. No form to fill in, and no charge for the call.
Commonly believed
Four things people assume about this test
"They must suspect something about my personal life."
The screen is done for every patient starting chemotherapy, in the same order, regardless of age, history or circumstances. It is on a printed list. Nobody has decided anything about you by ordering it.
"A positive result means I cannot have chemotherapy."
It means preventive medicine, closer liver monitoring and a second specialist joining the team. People with hepatitis B and with HIV receive full cancer treatment. What causes harm is the infection nobody knew about.
"I had jaundice as a child, so it is not relevant now."
It is highly relevant. A hepatitis B infection the body controlled decades ago can still reactivate when immunity falls. Mention any history of jaundice, hepatitis or liver trouble however long ago it was.
"Better to refuse the test than risk it being known."
Refusing does not remove the infection, only the protection. An undetected flare during treatment damages the liver and postpones chemotherapy. Ask instead about privacy, which is a request the hospital can actually accommodate.
Questions we are asked
Common questions about the infection screen
Is this test compulsory?
It is standard before chemotherapy and strongly advised, because the risk it protects against is real and preventable. If you have concerns about privacy, raise those rather than declining the test itself.
Why does hepatitis B matter so much?
Because it can reactivate when immunity falls during treatment and damage the liver seriously. Knowing in advance allows a preventive antiviral to be started, which is why this test is on every pre-treatment list.
What if I tested negative some years ago?
It is repeated before treatment regardless. Tell the team about the earlier test and bring the report if you have it, but expect a current result to be required. The markers checked may also differ from last time.
Will my family be told the result?
Your results belong to you. Tell the doctor if you want them given privately, and ask at the time of the test rather than afterwards. For hepatitis B, close family may separately be offered testing and vaccination for their own protection.
Will treatment be delayed if it is positive?
Sometimes by a short period while preventive medicine is started and a liver specialist is involved. That is time well spent. It is far shorter than the delay a flare mid-course would cause.
Does this affect my insurance?
Ask the hospital's insurance desk directly rather than guessing. Concealing a known condition on a form is a far stronger ground for a later refusal than the condition itself. Get advice before anything is submitted.
Can I be treated for hepatitis at the same time?
For hepatitis B, a preventive antiviral is usually given alongside chemotherapy. Hepatitis C treatment is often planned around the cancer treatment rather than during it. The two teams decide the order together.
Should my spouse and children be tested?
For hepatitis B, yes, it is usually offered, and vaccination is available for those who are not infected. Ask your team to arrange it. It is a protective step for them, not a statement about anybody.
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Sources
- Cancer Research UK — Tests before cancer treatment
- Macmillan Cancer Support — Blood tests before treatment
- National Cancer Institute — Infections in People With Cancer
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.
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