Hematologist
CION Cancer Clinics
How donated blood is screened and kept safe in India | CION Cancer Clinics
Every unit of donated blood in a licensed Indian blood centre is tested for HIV, hepatitis B, hepatitis C, syphilis and malaria, then grouped and cross-matched with the patient. This makes transfusion very safe, but not risk-free: a very recent infection can be missed, and reactions can still happen. Here is what the checks do, what they cannot do, and what you can ask. At CION Cancer Clinics, our haematologist cares for anaemia, bleeding, clotting and inherited blood disorders, with ArogyaSri, CGHS and cashless insurance accepted.
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Medically reviewed by Dr. Basudev PokhrelConsultant Haematologist · last reviewed September 2026, next review due September 2027
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On this page
- Is donated blood tested before it reaches a patient in India?
- What is every unit checked for?
- What happens between the donor and the bedside?
- What do families get wrong about blood safety?
- What do the words on the blood bank form mean?
- What should you ask, and what can this page not tell you?
- Common questions about transfusion safety
The short answer
Is donated blood tested before it reaches a patient in India?
Yes. Every unit of donated blood in a licensed Indian blood centre must be tested for HIV, hepatitis B, hepatitis C, syphilis and malaria before it is released. It is also grouped and matched against the patient's own blood.
What that means for you
These checks make transfusion very safe, and the chance of picking up an infection from a unit of tested blood is small. Small is not zero. A donor who caught an infection only days before donating may not yet show it on any test. That gap is called the window period, and it is the main reason the donor questions matter as much as the laboratory.
Why this page matters if you have a blood disorder
People with leukaemia, lymphoma, thalassaemia, aplastic anaemia (a bone marrow that makes too few blood cells) or cancer on chemotherapy may need many transfusions over months. Each unit carries its own small risk, so the safety steps add up over time. Your haematology team weighs that against the risk of not transfusing.
This page explains the system in general. It cannot tell you how a particular blood centre runs its tests. Ask them directly.Mandatory tests
What is every unit checked for?
Some checks look for infection. Others make sure the blood suits the person who will receive it.
Viruses carried in blood
HIV, hepatitis B and hepatitis C are the infections that worry families most. Blood centres test for them on every unit, and a unit that reacts on any test is thrown away.
How it is usually tested
- ELISA or similar antibody and antigen tests
- NAT (a gene-level test) at many larger centres
Syphilis and malaria
Both can pass through a transfusion. Malaria testing matters in India because the parasite is common in some districts and a donor may carry it without feeling ill.
Blood group
The ABO group and RhD type are checked twice, once on the donor and once on the patient. A mismatch here is the cause of the most serious reactions, so this step is never skipped.
Cross-match with the patient
A sample of your blood is mixed with the donor's red cells in the laboratory. It checks that your body does not already carry antibodies that would attack those cells.
This is why the blood centre asks for a fresh sample of the patient's blood.Not sure whether this applies to you?
Ask an oncologistThe safety chain
What happens between the donor and the bedside?
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The donor is questioned and checked
Before a needle goes in, the donor answers private questions about health, recent illness, tattoos, travel and sexual history. Weight, haemoglobin and blood pressure are checked. Anyone at risk is turned away here, which catches infections a test could still miss.
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The blood is collected in a sealed bag
A single-use sterile bag with a unique barcode is used. That number follows the unit all the way to the patient.
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The laboratory runs the infection tests
Samples from the bag go through the mandatory tests. The unit stays in quarantine until every result is clear.
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The unit is split and stored
Most blood is separated into red cells, plasma and platelets, each stored at its own temperature. Some patients get filtered or irradiated units, depending on their treatment.
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Grouping and cross-match for you
Your sample is grouped and matched against the chosen unit.
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Checks at the bedside
Two staff members compare your name, hospital number, blood group and the bag label before starting. You are watched closely, especially in the first part of the transfusion.
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Tell the nurse at once
If you or your family member feels shivering, fever, breathlessness, chest or back pain, a rash, itching or swelling of the face during or soon after a transfusion, tell the nurse straight away and ask for the transfusion to be checked. If it happens after going home, go to the nearest emergency department or call 108. Do not wait to see if it settles.
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Commonly believed
What do families get wrong about blood safety?
"Blood from our own family is safer than blood from the bank."
Not necessarily. Family donors can feel pressure to hide a risk they would have admitted to a stranger. Blood from a close relative also carries a rare but serious reaction unless it is irradiated. Regular voluntary donors are usually the safest source.
"If the blood is tested, there is nothing left to worry about."
Testing lowers the risk a great deal, but a very recent infection can be missed. Reactions that have nothing to do with infection, such as allergy or fluid overload, can still happen. That is why you are watched during the transfusion.
"Paying for blood gets you better blood."
Selling blood is illegal in India. Charges at a blood centre cover testing, bags and storage, not the blood itself. Anyone offering a paid donor outside the centre is offering a less safe option.
"Many transfusions mean the doctor is doing something wrong."
Some conditions and treatments simply need repeated support. Your team decides each transfusion on your counts and symptoms, and can explain why each one is given.
On the form or the bag
What do the words on the blood bank form mean?
- Non-reactive
- The unit tested clear for that infection. Reactive units are discarded.
- NAT
- Nucleic acid testing. It looks for the virus's genetic material and can pick up an infection earlier than antibody tests.
- Window period
- The early stretch after infection when tests cannot yet detect it.
- Leucodepleted
- White cells have been filtered out. This lowers the chance of fever reactions and some infections.
- Irradiated
- The unit has been treated so that donor white cells cannot attack the patient. It is often needed after certain chemotherapy or a transplant.
- Compatible
- The cross-match found no reaction between your blood and the donor's.
Being straight with you
What should you ask, and what can this page not tell you?
You are allowed to ask questions before a transfusion. A good blood centre will answer them calmly. Asking does not delay care or offend anyone.
Questions worth asking
Is the blood centre licensed? Is NAT testing done, or antibody testing only? Does this patient need filtered or irradiated units because of their treatment? Who should we call if a reaction starts after going home? If the patient is likely to need a stem cell transplant later, ask whether family members should avoid donating for now.
What this page cannot tell you
It cannot tell you whether a transfusion is right for you, or how often you will need one. That depends on your diagnosis, your counts, your symptoms and your treatment plan. Reference ranges also differ between laboratories, so one result is read alongside how you feel and repeat tests.
How CION helps
CION's haematology team reviews the case, explains why blood support is advised and coordinates transfusion with licensed blood centres. Never stop or refuse a planned transfusion on your own. Talk to the treating team first.
Questions we are asked
Common questions about transfusion safety
Can I get HIV or hepatitis from a blood transfusion in India?
The risk is very low, because every unit is tested and risky donors are turned away first. It is not zero. A donor infected very recently may still test clear. If you are worried after a transfusion, speak to your haematologist, who can arrange follow-up tests at the right time rather than guessing.
What is NAT testing and should I insist on it?
NAT looks for the genetic material of HIV and the hepatitis viruses, so it can find an infection earlier than antibody tests. Not every centre offers it. For someone needing many transfusions, it is reasonable to ask whether NAT-tested units are available and whether there is an extra charge.
Why does the blood bank need a fresh sample from the patient?
The cross-match must use blood that shows what antibodies the patient carries now. People who have had transfusions, pregnancies or certain treatments can develop new antibodies. An old sample may miss them, and that can lead to a reaction.
Is blood from a relative safer?
Not automatically. Relatives may not share their full health history under family pressure, and blood from a close relative needs irradiation to prevent a rare, serious reaction. If a stem cell transplant is possible later, family donation can cause problems. Ask your haematologist before arranging a relative as a donor.
What reactions can happen during a transfusion?
Mild ones include a raised temperature, chills, itching or a rash. Serious ones are rare and include breathlessness, a drop in blood pressure, chest or back pain and dark urine. Staff watch closely for these. Tell the nurse the moment anything feels different.
What do filtered and irradiated blood mean?
Filtered blood has most white cells removed, which lowers fever reactions. Irradiated blood has been treated so donor white cells cannot attack the patient. Some people with blood cancers, or those on certain treatments, need these. Your team decides, so check the order before the unit is collected.
Can I refuse a transfusion?
You have the right to decide, and to ask why it is advised and what the alternatives are. Refusing can be dangerous when the counts are very low or there is bleeding. Discuss it openly with the treating team before deciding, so the choice is based on your own situation.
Does CION have its own blood bank?
CION's haematology team assesses the patient, decides when blood support is needed and coordinates it with licensed blood centres. Ask the team which centre will supply the units, what tests that centre runs, and who to call if a reaction happens after you leave.
Your Haematologist
Meet CION's haematologist. One specialist for your blood report and your plan.
Dr. Basudev Pokhrel reviews blood counts, transfusion needs and blood disorders, and works with the CION tumour board on blood cancers.
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Where to find us
Our centres in and around Hyderabad
Addressed by landmark, because that is how this city navigates. A haematology consultation can be booked at any of these centres through one helpline, and your team will tell you where each test or treatment takes place.
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Sources
- WHO — Blood safety and availability
- NHS — Blood transfusion
- NHLBI — Blood Transfusion
- American Cancer Society — Blood Transfusion and Donation
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.
Keep reading
Related pages
Blood Groups and Compatibility ExplainedWhy the group and cross-match must agreeWhat Happens to Donated BloodHow one donation becomes red cells, plasma and plateletsDirected and Replacement DonationWhen the blood bank asks your family for a donorTransfusion and Blood DonationThe full guide to giving and receiving blood
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