Blood Transfusions : Science and Tech : UPSC 2026

Added: 2026-05-26

[00:00:00]A blood transfusion is meant to save life.

[00:00:03]But if safety checks fail, it can also put life at risk. Recently, five children with thalassemia tested HIV positive after blood transfusion at a government hospital in Jharkhand. This makes blood transfusion safety very important for UPSC.

[00:00:20]Blood transfusion means transferring blood or blood components from a donor to a patient.

[00:00:26]Doctors use it to restore blood volume, improve oxygen carrying capacity, or correct blood deficiencies.

[00:00:34]Thalassemia patients often need regular transfusions.

[00:00:38]Thalassemia is a hereditary blood disorder.

[00:00:41]In this disease, the body makes less hemoglobin or defective hemoglobin.

[00:00:46]Hemoglobin carries oxygen inside red blood cells.

[00:00:50]When hemoglobin remains low, the patient develops chronic anemia.

[00:00:55]That is why many thalassemia patients depend on repeated blood transfusions.

[00:01:00]But transfusion needs two types of safety.

[00:01:03]First, blood group matching.

[00:01:05]Second, infection screening.

[00:01:08]For matching, remember the and Rh systems. Red blood cells may have A antigen, B antigen, both, or none.

[00:01:16]This gives four main groups: A, B, AB, and O.

[00:01:21]There is also the Rh factor.

[00:01:23]If Rh is present, the blood group is positive.

[00:01:27]If Rh is absent, it is negative.

[00:01:30]Together, they create common blood types like A positive, B negative, O positive, O negative, AB positive, and AB negative.

[00:01:39]If the wrong blood enters the body, the immune system may attack it.

[00:01:44]This can become dangerous.

[00:01:46]For red blood cell transfusion, O negative is called the universal donor because it lacks A, B, and Rh antigens.

[00:01:55]AB positive is called the universal recipient because it has AB and Rh antigens and usually lacks antibodies against them. But hospitals still do proper matching and cross-matching.

[00:02:08]Universal donor does not mean careless transfusion.

[00:02:12]The second safety check is infection screening. Every donated blood unit must be tested properly before transfusion.

[00:02:19]It should not carry infections like HIV, hepatitis, or other transfusion-transmitted diseases.

[00:02:26]So, remember this clearly.

[00:02:28]Blood transfusion is life-saving.

[00:02:31]But safe transfusion needs correct blood group matching, strict screening, proper storage, and strong hospital accountability. Subscribe to our channel Clarity UPSC and download our app for all science and tech current affairs 2026.