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Answer.

Blood transfusion is the transfer of blood from one person (donor) to another person (recipient)through blood vessels. Transfusion is done to replace lost blood due to illness, accidents or bleeding.

Although blood transfusions can be life-saving, they are not without risks. The following aredisadvantages of blood transfusions:

1. Allergic reaction: This is the most common reaction. It happens during the transfusionwhen the body reacts to plasma proteins or other substances in the donated blood.

2. Fever reaction: The person gets a sudden fever during or within 24 hours of the transfusion. Headache, nausea, chills, or a general feeling of discomfort may come withthe fever.

3. Haemolytic reactions: In very rare cases, the patient’s blood destroys the donor red bloodcells. This is called haemolysis. This can be severe and may result in bleeding and inkidney failure.

4. Diseases:If proper screening of the donated blood is not observed, it can cause transmission of diseases from the donor to the recipient. Examples of such transmissible diseases are HIV virus, hepatitis, and other infections.

5. Patients who are given too much blood can develop high blood pressure, a concern forpeople who have heart disease.

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