Medical Oncologist
CION Cancer Clinics
Is donated blood safe to receive? | CION Cancer Clinics
Blood from a licensed blood centre is very safe. Every donated unit is tested for HIV, hepatitis B and C, syphilis and malaria, and then matched to your own blood before it is given. The chance of catching an infection is very small, but it is not zero. This page explains how that safety is built, what the real risks are, and what to ask your team before surgery. CION Cancer Clinics’ surgical oncologists in Hyderabad can talk this through with you.
MI
Medically reviewed by Dr. Mohammed ImaduddinConsultant Surgical Oncologist · MBBS, MS (General Surgery), MCh (Surgical Oncology) · last reviewed September 2026, next review due September 2027
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On this page
- Is donated blood safe to receive during cancer surgery?
- What is every unit of blood tested for?
- What happens to blood before it reaches your arm?
- What do the words about blood safety mean?
- If infection is so rare, what are the real risks?
- What should you ask your team about blood?
- What do families believe about donated blood, and what is true?
- Common questions about the safety of donated blood
The short answer
Is donated blood safe to receive during cancer surgery?
Yes, blood from a licensed blood centre is very safe, and the chance of catching an infection from it is very small. It is not zero, and a good team will tell you that plainly rather than wave the question away.
What makes it safe
Safety does not come from one test. It comes from several layers stacked together. The donor answers health questions and is checked before giving blood. Every unit is then tested in a laboratory for the infections that matter most. It is stored at the right temperature, matched to your blood, and checked again at your bedside before it goes in.
Why families still worry
Many families remember a time, or a story, from before testing was as thorough as it is now. Others worry because the blood comes from a stranger. Both worries are reasonable to raise. The useful question is not only "is it safe?" It is "what has been done to this unit, and who checked it?" Your team can answer that.
This page explains the safety of blood itself. Whether you need a transfusion is a decision for your surgical and anaesthesia team.In the laboratory
What is every unit of blood tested for?
In India, a licensed blood centre must test every donated unit before it can be issued. A unit that fails any test is thrown away.
HIV
The virus that causes AIDS. Testing picks up the virus or the body's response to it. This is the infection families ask about first.
Hepatitis B and C
Two viruses that affect the liver. Hepatitis B is more common in India than HIV, which is why screening for it matters so much.
Syphilis and malaria
A bacterial infection and a parasite carried by mosquitoes. Both can pass through blood, so both are checked on every unit.
Your blood group
The unit is grouped, and then a sample of your own blood is mixed with it in the laboratory to make sure the two are compatible.
Worth asking your centre
- Whether they use NAT testing
- Whether units are leucodepleted
Not sure whether this applies to you?
Ask an oncologistFrom donor to you
What happens to blood before it reaches your arm?
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The donor is screened
Before giving blood, the donor answers questions about recent illness, travel, tattoos and medicines, and has a quick health check. Anyone at higher risk is turned away that day.
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Collection in a sterile bag
Blood is collected with a new, single-use needle into a sealed bag. The bag is labelled so it can be traced back to the donation.
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Testing and separation
Samples are tested for infections. The unit is usually split into red cells, plasma and platelets, so each patient gets only the part they need.
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Matching to you
Your blood sample is grouped and crossmatched against the unit. This is why the team takes blood from you before the operation.
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Bedside checks
Two staff members check your name, wristband and the bag label together before the transfusion starts, and you are watched closely in the first minutes.
On the consent form
What do the words about blood safety mean?
- Window period
- The short time after someone catches an infection when tests cannot yet find it. This is the main reason the risk is very small rather than none.
- NAT
- Nucleic acid testing. It looks for the virus itself rather than the body's response, so it can find an infection earlier.
- Crossmatch
- A laboratory test that mixes your blood with the donor unit to check they are compatible.
- Leucodepleted
- Blood that has had most of the white cells filtered out. It lowers the chance of some reactions.
- Irradiated
- Blood treated with radiation so donor white cells cannot attack you. It does not make the blood radioactive.
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Being straight with you
If infection is so rare, what are the real risks?
The risks that doctors watch most closely are not infections. They are reactions, and mistakes in matching the right blood to the right person. Both are uncommon, and both are the reason the checks around a transfusion are so strict.
Reactions to the blood
Some people get a mild fever, shivering or an itchy rash. These usually settle quickly once the transfusion is slowed or stopped. Serious allergic reactions and breathing problems are rare, and the nurse is trained to spot them early.
Getting the wrong unit
A mix-up of samples or labels is the risk safety systems work hardest to prevent. That is why you will be asked your name and date of birth again and again. It can feel repetitive. Answer every time, out loud.
What this page cannot tell you
It cannot tell you how likely you are to need blood, or how the risk compares with the risk of going without it. That depends on your operation, your haemoglobin and your heart. Ask your surgeon directly.
Before the operation
What should you ask your team about blood?
The question
Why it helps
How likely is it that I will need blood?
For many operations it is unlikely. Knowing early helps you plan donors.
Where does the blood come from?
A licensed blood centre, in-house or linked, should be the answer.
Is my haemoglobin low enough to fix first?
Building it up before surgery can lower the chance of needing blood.
Who do I tell if I feel unwell during it?
The nurse beside you. Say so at once, even if it seems minor.
Commonly believed
What do families believe about donated blood, and what is true?
"Blood from our own relative is safer than blood bank stock."
Not usually. Regular voluntary donors are screened again and again, so their blood is often lower risk than a first-time donor's. Blood from a close relative also carries a rare risk of a serious reaction, and must be irradiated if it is used.
"A transfusion can pass on the donor's cancer, habits or nature."
Blood does not carry a person's character, and people with cancer are not accepted as donors. Your body replaces the donated red cells with your own over time.
"If blood is tested, nothing at all can go wrong."
Testing makes infection very unlikely, not impossible, and reactions can still happen. That is why you are watched during the transfusion.
"Refusing blood is always the safer choice."
When blood is truly needed, going without it carries its own serious risks. If you have concerns, raise them before surgery so the team can plan around them.
Questions we are asked
Common questions about the safety of donated blood
Can I get HIV from a blood transfusion in India?
It is very unlikely when blood comes from a licensed blood centre, because every unit is tested for HIV before it is issued. The small remaining risk comes from the window period, when a very recent infection cannot yet be picked up. Ask your centre whether they use NAT testing, which shortens that window.
Is blood from a private blood bank safer than a government one?
What matters is whether the blood centre is licensed and follows the required testing, not whether it is private or government run. Both must test every unit for the same infections. If you are unsure, ask the hospital which blood centre supplies them and whether it is licensed.
Should I ask a family member to donate blood for me directly?
Families often feel this is safer, but it usually is not. Blood from a close relative needs extra treatment to prevent a rare, serious reaction. Relatives are more often asked to donate as replacement donors, which restocks the blood bank without the blood coming directly to you. Your team will explain the local rules.
Will I be tested for infections after a transfusion?
Routine testing afterwards is not usually needed, because the blood was tested before you received it. If you develop an unexplained fever, yellowing of the eyes or feel unwell in the weeks after, tell your doctor and mention that you had a transfusion, so they can think about it.
Can I use my own blood instead?
Sometimes. Some centres can collect and return blood lost during the operation, called cell salvage. Storing your own blood weeks ahead is rarely used for cancer surgery now, partly because it can lower your haemoglobin just before the operation. Ask your surgeon which options your centre actually offers.
Does donated blood stay in my body forever?
No. Red cells have a natural lifespan, and donated cells are gradually cleared and replaced by cells your own bone marrow makes. The transfusion does its job by carrying oxygen while your body recovers from the operation. Nothing about it changes who you are.
Are platelets and plasma tested in the same way?
Yes. Platelets and plasma come from donors who are screened and tested for the same infections. Platelets are stored warm, so they carry a slightly higher chance of bacterial growth than red cells, and blood centres check them carefully for this. They also have a much shorter shelf life.
What if my religion or beliefs do not allow blood?
Tell your surgeon at the very first appointment, not on the day of surgery. An adult who understands the decision can refuse blood. Early notice gives the team time to build your haemoglobin, plan blood-saving methods and discuss honestly what they can and cannot do if bleeding happens.
Meet the Specialists
17+ senior cancer specialists. One panel for your case.
Trained at AIIMS, Tata Memorial, and leading international centres. Combined 150+ years of experience. Every complex case is reviewed by 3+ of them — together.
Medical Oncologist
Dr. C. Raghavendra Reddy
MBBS(Gold Medal), DNB(General Medicine), DM(Medical Oncology)(Gold Medal)
Medical Oncologist
Dr. Bharati Devi Gorantla
MBBS, MD(General Medicine), DM(Medical Oncology)(Adyar,Chennai), ECMO, MRCP SCE(UK)
Medical Oncologist
Dr. Owais Mohammed
MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)
Medical Oncologist
Medical Oncologist
Surgical Oncologist
Dr. Muralidhar Muddusetty
MBBS (AIIMS), MS (Surgery) (AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh)
Surgical Oncologist
Surgical Oncologist
Surgical Oncologist
Dr. Vinay Mamidala
MBBS, MS(General Surgery), M.Ch(Surgical Oncology), FMAS, FARIS(Ongoing)
Surgical Oncologist
Radiation Oncologist
Radiation Oncologist
Radiation Oncologist
Hematologist
Surgical Oncologist
Dr. Vajja Sandeep Kumar
MBBS, MS (General Surgery), DrNB (Surgical Oncology), FALS Oncology
Surgical Oncologist
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Sources
- NHS — Blood transfusion
- NICE — Blood transfusion (NG24)
- Macmillan Cancer Support — Cancer information and support
- American Cancer Society — Cancer treatment types
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 Transfusion Around Cancer SurgeryWhen blood is needed and how it is givenTransfusion Reactions: What to Watch ForThe signs to tell the nurse about at onceReplacement Donors: Finding Them and the RulesWhat the family is asked to arrangeIron and Building Haemoglobin Before SurgeryLowering the chance of needing blood at all
Talk to us
Worried about needing blood during surgery?
Tell us what operation has been suggested and what worries you. A surgical oncologist will talk it through with you. One helpline serves every CION centre.