The blood wiki
Know the system. Beat the system's gaps.
Assam-specific explainers maintained by our team, how blood actually moves through this state, what to do in an emergency, and how institutions can help. Sourced, dated, honest.
Compatibility
Can A− donate blood to AB+?
Yes, A− red cells can be given to AB+ patients. The compatibility science, what else A− donors can d…
Can B+ donate blood to A+?
No, B+ red cells cannot go to A+ patients. Which groups A+ can receive from, and what B+ donors can …
Can AB+ donate blood to O−?
No, AB+ red cells cannot go to O− patients. Which groups O− can receive from, and what AB+ donors ca…
Can O+ donate blood to B−?
No, O+ red cells cannot go to B− patients. Which groups B− can receive from, and what O+ donors can …
Can B− donate blood to B−?
Yes, B− red cells can be given to B− patients. The compatibility science, what else B− donors can do…
Can O− donate blood to A−?
Yes, O− red cells can be given to A− patients. The compatibility science, what else O− donors can do…
Can AB− donate blood to AB+?
Yes, AB− red cells can be given to AB+ patients. The compatibility science, what else AB− donors can…
Can A+ donate blood to B+?
No, A+ red cells cannot go to B+ patients. Which groups B+ can receive from, and what A+ donors can …
Can AB+ donate blood to A−?
No, AB+ red cells cannot go to A− patients. Which groups A− can receive from, and what AB+ donors ca…
Can AB+ donate blood to AB+?
Yes, AB+ red cells can be given to AB+ patients. The compatibility science, what else AB+ donors can…
Can B− donate blood to O−?
No, B− red cells cannot go to O− patients. Which groups O− can receive from, and what B− donors can …
Can O+ donate blood to AB−?
No, O+ red cells cannot go to AB− patients. Which groups AB− can receive from, and what O+ donors ca…
Can A+ donate blood to O−?
No, A+ red cells cannot go to O− patients. Which groups O− can receive from, and what A+ donors can …
Can O+ donate blood to A−?
No, O+ red cells cannot go to A− patients. Which groups A− can receive from, and what O+ donors can …
Can O− donate blood to B−?
Yes, O− red cells can be given to B− patients. The compatibility science, what else O− donors can do…
Can B− donate blood to AB−?
Yes, B− red cells can be given to AB− patients. The compatibility science, what else B− donors can d…
Can AB− donate blood to B+?
No, AB− red cells cannot go to B+ patients. Which groups B+ can receive from, and what AB− donors ca…
Can B− donate blood to AB+?
Yes, B− red cells can be given to AB+ patients. The compatibility science, what else B− donors can d…
Can AB− donate blood to O−?
No, AB− red cells cannot go to O− patients. Which groups O− can receive from, and what AB− donors ca…
Can B+ donate blood to O+?
No, B+ red cells cannot go to O+ patients. Which groups O+ can receive from, and what B+ donors can …
Can AB+ donate blood to B−?
No, AB+ red cells cannot go to B− patients. Which groups B− can receive from, and what AB+ donors ca…
How blood compatibility actually works
Why blood types can't mix, what the antigens and antibodies are doing, and why the crossmatch (not t…
What happens in an incompatible transfusion, and why it's
The science of a transfusion reaction, the bedside warning signs, the stop-first protocol, and the l…
Can A− donate blood to AB−?
Yes, A− red cells can be given to AB− patients. The compatibility science, what else A− donors can d…
Can B− donate blood to B+?
Yes, B− red cells can be given to B+ patients. The compatibility science, what else B− donors can do…
Can B+ donate blood to A−?
No, B+ red cells cannot go to A− patients. Which groups A− can receive from, and what B+ donors can …
Can B− donate blood to A−?
No, B− red cells cannot go to A− patients. Which groups A− can receive from, and what B− donors can …
Can O− donate blood to O−?
Yes, O− red cells can be given to O− patients. The compatibility science, what else O− donors can do…
Can A+ donate blood to A−?
No, A+ red cells cannot go to A− patients. Which groups A− can receive from, and what A+ donors can …
Can B− donate blood to O+?
No, B− red cells cannot go to O+ patients. Which groups O+ can receive from, and what B− donors can …
Can O− donate blood to B+?
Yes, O− red cells can be given to B+ patients. The compatibility science, what else O− donors can do…
Can AB+ donate blood to A+?
No, AB+ red cells cannot go to A+ patients. Which groups A+ can receive from, and what AB+ donors ca…
Can A+ donate blood to A+?
Yes, A+ red cells can be given to A+ patients. The compatibility science, what else A+ donors can do…
Can B− donate blood to A+?
No, B− red cells cannot go to A+ patients. Which groups A+ can receive from, and what B− donors can …
Can AB− donate blood to B−?
No, AB− red cells cannot go to B− patients. Which groups B− can receive from, and what AB− donors ca…
Can AB− donate blood to A−?
No, AB− red cells cannot go to A− patients. Which groups A− can receive from, and what AB− donors ca…
Blood group chart: who can give to whom, at a glance
The complete ABO/Rh compatibility table, red cells, plasma and who can receive from whom, on one pag…
Can AB+ donate blood to B+?
No, AB+ red cells cannot go to B+ patients. Which groups B+ can receive from, and what AB+ donors ca…
Can O− donate blood to O+?
Yes, O− red cells can be given to O+ patients. The compatibility science, what else O− donors can do…
Can B+ donate blood to B−?
No, B+ red cells cannot go to B− patients. Which groups B− can receive from, and what B+ donors can …
Can A− donate blood to B−?
No, A− red cells cannot go to B− patients. Which groups B− can receive from, and what A− donors can …
Can O+ donate blood to A+?
Yes, O+ red cells can be given to A+ patients. The compatibility science, what else O+ donors can do…
Can O+ donate blood to AB+?
Yes, O+ red cells can be given to AB+ patients. The compatibility science, what else O+ donors can d…
Can O+ donate blood to O−?
No, O+ red cells cannot go to O− patients. Which groups O− can receive from, and what O+ donors can …
Can B+ donate blood to O−?
No, B+ red cells cannot go to O− patients. Which groups O− can receive from, and what B+ donors can …
Can AB− donate blood to A+?
No, AB− red cells cannot go to A+ patients. Which groups A+ can receive from, and what AB− donors ca…
Can A+ donate blood to AB+?
Yes, A+ red cells can be given to AB+ patients. The compatibility science, what else A+ donors can d…
Can O− donate blood to AB−?
Yes, O− red cells can be given to AB− patients. The compatibility science, what else O− donors can d…
Can O− donate blood to AB+?
Yes, O− red cells can be given to AB+ patients. The compatibility science, what else O− donors can d…
Can AB+ donate blood to O+?
No, AB+ red cells cannot go to O+ patients. Which groups O+ can receive from, and what AB+ donors ca…
Can A− donate blood to O−?
No, A− red cells cannot go to O− patients. Which groups O− can receive from, and what A− donors can …
Can AB+ donate blood to AB−?
No, AB+ red cells cannot go to AB− patients. Which groups AB− can receive from, and what AB+ donors …
Can B+ donate blood to B+?
Yes, B+ red cells can be given to B+ patients. The compatibility science, what else B+ donors can do…
Can O+ donate blood to O+?
Yes, O+ red cells can be given to O+ patients. The compatibility science, what else O+ donors can do…
Can A+ donate blood to B−?
No, A+ red cells cannot go to B− patients. Which groups B− can receive from, and what A+ donors can …
Can O+ donate blood to B+?
Yes, O+ red cells can be given to B+ patients. The compatibility science, what else O+ donors can do…
Can A+ donate blood to AB−?
No, A+ red cells cannot go to AB− patients. Which groups AB− can receive from, and what A+ donors ca…
Can B+ donate blood to AB+?
Yes, B+ red cells can be given to AB+ patients. The compatibility science, what else B+ donors can d…
Can A− donate blood to O+?
No, A− red cells cannot go to O+ patients. Which groups O+ can receive from, and what A− donors can …
Can AB− donate blood to AB−?
Yes, AB− red cells can be given to AB− patients. The compatibility science, what else AB− donors can…
Blood typing, step by step, how your group is determined
How a lab finds your blood group: forward and reverse grouping, Rh and weak-D testing, repeat checks…
Can AB− donate blood to O+?
No, AB− red cells cannot go to O+ patients. Which groups O+ can receive from, and what AB− donors ca…
Emergency blood, why teams don't wait
Why unknown-group trauma patients get O negative blood first, how massive transfusion protocols work…
Antigens and antibodies, the two words that explain blood
What antigens and antibodies really are, why your plasma attacks blood groups you lack, and how two …
The crossmatch, the final check before any transfusion
What a crossmatch test is, major versus minor, the computer crossmatch, type and screen, how long it…
Can A+ donate blood to O+?
No, A+ red cells cannot go to O+ patients. Which groups O+ can receive from, and what A+ donors can …
Red cells vs plasma, the compatibility flip that surprises
AB is the universal red-cell recipient but the universal plasma donor. O is the opposite. Why one do…
Can B+ donate blood to AB−?
No, B+ red cells cannot go to AB− patients. Which groups AB− can receive from, and what B+ donors ca…
Can A− donate blood to B+?
No, A− red cells cannot go to B+ patients. Which groups B+ can receive from, and what A− donors can …
Can A− donate blood to A−?
Yes, A− red cells can be given to A− patients. The compatibility science, what else A− donors can do…
Can O− donate blood to A+?
Yes, O− red cells can be given to A+ patients. The compatibility science, what else O− donors can do…
Can A− donate blood to A+?
Yes, A− red cells can be given to A+ patients. The compatibility science, what else A− donors can do…
System, safety & Assam
Lab-Grown Red Blood Cells: Promising Science, Distant
Lab-grown red blood cells: small early trials have been reported, but can stem-cell-derived blood ev…
e-RaktKosh: check blood availability online (portal guide)
The government's national blood stock platform, and how to use it before you travel to any bank.…
How to donate blood in Assam, the complete 2026 guide
Where to go, what to carry, what it costs (nothing), and how the register alerts you when your group…
Voluntary vs replacement donation, the stat that explains
Most of Assam's blood comes from patients' own families. Here's why that's a problem and what change…
Blood donation certificates: what you get and what they mean
Every donation earns a certificate and a donor card, here is what they contain, why they matter, and…
How to organise a blood donation camp in Assam
For colleges, clubs, companies and community groups, the practical steps to run a camp with a licens…
Can Blood Be Manufactured? The Honest Science
Can blood be manufactured in a factory? An honest look at why no machine makes whole blood, what sci…
World Blood Donor Day: June 14, and what Assam does
June 14 is World Blood Donor Day, the day the system thanks its volunteers, and the easiest day of t…
Blood donation rally and awareness event ideas for colleges
Rally formats, human-chain ideas and campus events that turn awareness into actual registrations, no…
Artificial Oxygen Carriers: Can Anything Substitute for Red
Artificial blood alternatives: perfluorocarbons, haemoglobin-based carriers, freeze-dried plasma and…
Camp anchoring script: what to say when the camp opens
A word-for-word anchoring script for camp openings, donor felicitations and the final thank-you, Ass…
Why Blood Expires: The Race Against Time Inside Every Blood
Why blood expires: the shelf life of red cells, platelets and plasma, what happens to expired units,…
Why monsoon is blood-donation season in Assam
Floods, dengue and cut-off roads, why the state's hardest months for blood are June to September.…
Cryoprecipitate and Albumin: The Lesser-Known Gifts Inside
Cryoprecipitate and albumin explained: the lesser-known blood products made from plasma, who needs t…
Where to donate blood in Assam, centres, camps and your
The three places donation happens, and how to find the one nearest you right now.…
25 blood donation facts that are actually true
Verified facts about blood and donation, the shareable kind, each one checked, none invented.…
Blood Banks in India: A Short History of Scandal, Reform
The history of blood banking in India: paid donors, the HIV scandal, the 1996 Supreme Court reforms,…
What blood costs in India, and why donation is free
Is blood free in India? Donating is free; licensed centres may charge regulated processing fees. The…
Universal donor blood, the science trying to make type O
Can science convert any blood into type O? Enzyme conversion research, lab-grown cells and synthetic…
The History of Blood Transfusion: From Desperate
From bloodletting to blood banks: the surprising, sometimes dangerous history of transfusion, from L…
40 blood donation quotes, famous and original
Famous quotes on giving blood, attributed correctly, plus original lines you may print for camp mate…
50 blood donation slogans for camps, posters and banners
Fifty original slogans for camp banners and posters, English with select Assamese lines, built for r…
Platelet donation in Assam, dengue season, cancer care and
Why platelet demand spikes every monsoon, why platelets can't be stockpiled, and how platelet donati…
What happens to your blood after you donate
From couch to patient, the testing, grouping, separation and cold chain every unit passes through.…
Blood donation speech: 2, 3 and 5 minute versions for
Ready-to-deliver speeches for assemblies and camps, short, honest, and built around the one line tha…
Blood donation captions for Instagram and WhatsApp status
Caption sets for your donation selfie, short lines, bandage-band posts, first-time pride, and camp-s…
Blood donation poster ideas that actually get people to
Poster concepts for school walls and camp gates, built around objections and facts, not clip-art hea…
Donating blood on your birthday: the tradition worth
Birthday donation, give blood on the day you arrived, is the easiest giving tradition to keep, and c…
Blood bank storage temperatures: blood, plasma, platelets
How donated blood is stored: red cells at 2-6°C, platelets at room temperature with agitation, plasm…
The Journey of a Blood Bag: From a Donor's Arm to a
Follow a single unit of donated blood through registration, testing, separation, storage, crossmatch…
Blood donation essay: 300, 500 and 1000 word versions
Exam-ready essays on blood donation with checked facts, why it matters, what the science says, and w…
Blood transfusion, explained for patients and families
What a transfusion is, which component your relative needs, how safety is ensured, and what families…
Blood groups
The Rh factor, the + and − behind your blood group
What the Rh factor actually is, why Rh− donors matter so much, weak D, anti-D in pregnancy, and the …
AB negative, the rarest of the eight
AB− appears in roughly 1 in 250 Indians, and its donors are special twice over: rare red cells for r…
Why is it called Rh? The rhesus monkey story
How blood research on rhesus macaques in 1937,1940 gave the Rh factor its name, explained transfusio…
O negative blood group, the universal red cell donor
O− is the universal red cell donor: no A, B or D antigens, fits every patient in an emergency, and i…
AB positive, the universal recipient, and plasma's
AB+ is found in roughly 1 in 13 Indians. Its red cells fit only one group, but AB plasma fits everyo…
B positive blood group, the Asia story
B+ is one of India's most common groups (roughly 1 in 3 people) far more than in the West. The popul…
Which blood group is the best?
None, every group is the "best" one for the patient who needs it. There is no superior blood type, o…
A positive blood group, the quiet workhorse
A+ is found in roughly 1 in 5 Indians. Who A+ red cells help, who can give to A+, the plasma note, a…
Same blood group marriage: problems, myths and facts
Identical groups in a couple are medically harmless, children inherit straightforwardly, and pregnan…
Blood group test at home: kits, accuracy and the better way
Home test kits exist and work, for curiosity. For anything that matters (donation, surgery, pregnanc…
B negative blood group, scarce where demand never stops
B− is found in roughly 1 in 90 Indians while B-group demand is enormous. The double squeeze on India…
Rare blood types, Bombay phenotype, Rh-null and the
What makes a blood type genuinely rare: Bombay phenotype, Rh-null golden blood, Kell-Duffy-Kidd comb…
O positive blood group, India's backbone
O+ is the most common blood group in India, roughly 1 in 3 people. Who O+ red cells help, who can gi…
Blood group matching for marriage: what actually matters
Same blood groups do NOT cause marriage problems. The one real medical note is Rh factor in pregnanc…
Can your blood group change?
Almost never. Your ABO group is fixed for life, a handful of extraordinary medical situations can ma…
A negative (A−) blood group: compatibility and donors
A− is found in under 1 in 100 Indians, yet its red cells help four patient groups. What A− means, wh…
Your body
Blood group diet plans: the honest science
The blood-group diet (eat for your A/B/O/AB) has been tested and has no scientific support. Here is …
Red blood cells, the oxygen couriers
What red blood cells do, why their shape and haemoglobin matter, how long they live, and why they're…
Why is blood red? (And why do veins look blue?)
The physics and chemistry of blood colour, haemoglobin and iron, bright vs dark red, why veins look …
AB negative diet and the AB blood type
AB− is the rarest of the eight groups, and the type-diet books have no special science for it either…
Blood group inheritance, how ABO and Rh actually work
Why blood groups exist, how a child's group is decided from the parents', where negative groups come…
O negative diet: what O− people should actually eat
No diet is specific to O negative. The high-protein "O diet" is marketing, not medicine, here is wha…
White blood cells, your immune army
Meet neutrophils, lymphocytes, monocytes, eosinophils and basophils, and find out why donated blood …
Haemoglobin: normal range and the donation cutoff
Normal Hb: roughly 12,15 g/dL for women and 13,17 for men. Donation needs at least 12.5, the finger-…
Platelet count: normal range and what low means
Normal platelet counts run roughly 150,000,450,000 per microlitre. Dengue season makes this number f…
Does donating blood help you lose weight?
No, a donation burns about 650 calories to replace the volume, but that is not a weight-loss plan an…
Can blood be donated after death?
No, routine blood donation ends at death. Organs and tissues can be donated, but blood from the body…
How many litres of blood does the human body have?
The average adult has about 5 litres of blood, here's how that's calculated, why donation is safe, a…
What happens when you lose blood?
From a nosebleed to a serious injury, how your body responds to blood loss, when it becomes dangerou…
B positive diet: what B+ people should really eat
Dairy-friendly "B diet" claims have no research behind them. Eat like a human, not like a type.…
Blood donation during Ramadan and fasting months
Fasting Muslims can generally donate, most scholars permit it with breaking the fast if needed, and …
Platelets, the emergency repair crew
What platelets are, how clotting works, why they last only five days in storage, and why dengue seas…
O positive diet: what actually matters for O+ people
There is no O+ specific diet. Skip the type-based eating plans; build on real fundamentals.…
A positive diet: the evidence-based answer
The "A types should be vegetarian" rule is diet-book lore. No controlled study supports type-based e…
Blood group and personality: does your type decide your
No. The "blood group personality" idea (popular in Japan and Korea) has been studied repeatedly and …
Finding blood donors on Facebook and WhatsApp: the honest
Social-media donor hunts work sometimes, here is how to do them right, and why a register beats a fo…
Haemoglobin and anaemia, the 12.5 rule, iron, and donating
What haemoglobin does, why India's donor cutoff is 12.5 g/dL, how to read a low-Hb result, and how v…
Long-term side effects of blood donation: what years of
Regular donation over years is safe within intervals, the one real long-term watch item is iron stor…
Bone marrow, the factory inside your bones
How bone marrow makes billions of blood cells daily, what raw materials it needs, and why blood dona…
Plasma, the liquid that carries everything
What blood plasma is, the proteins it carries, why frozen plasma lasts up to a year, and who depends…
What is blood? The complete biology, in plain language
What blood is made of, what each component does, how your body makes it, and why understanding this …
Blood disorders, explained, anaemia to thalassemia, sickle
Major blood disorders in plain language: anaemia, thalassemia, sickle cell, haemophilia, leukemia, d…
Pregnancy & blood
Rh incompatibility in pregnancy, anti-D and why it matters
When an Rh− mother carries an Rh+ baby: sensitisation, haemolytic disease of the fetus and newborn, …
Can blood transfusions transmit disease? The testing
Every unit in India is tested for HIV, hepatitis B and C, syphilis and malaria. How testing works, t…
Transfusion reactions, what can happen, and how staff watch
The kinds of transfusion reactions (fever, allergic, haemolytic, delayed) why most are mild and mana…
Massive transfusion and trauma, when a body needs blood at
What massive transfusion protocols are, how blood loss staggers the body, why O− units and balanced …
Blood groups in pregnancy, ABO, testing and transfusions
Why every pregnancy starts with a blood group test, what ABO incompatibility means (and why it's mil…
Blood disorders
Thalassemia, the transfusion-calendar life, explained
What thalassemia major means, why patients need red cells every 2,4 weeks for life, iron overload an…
Sickle cell disease, misshapen cells, and why donors matter
What sickle cell disease and trait mean, the pain crises, who it affects in India, transfusion's rol…
Haemophilia, when blood can't clot, explained
What haemophilia A and B are, why it mostly affects boys, how factor replacement therapy works, and …
Maintained by the team, edited via review only. Suggestions and corrections are welcome, contact us.