Question

write down the principle of vaccination(b) why is it important​

Answer 1

The main principle of vaccination is the proactive induction of a protective immune response by mimicking the natural interaction of an infectious pathogen (bacteria, viruses, etc.) with the human immune system.

OR

The principle of immunisation or vaccination is based on the property of 'memory' of the immune system. In vaccination, a preparation of antigenic proteins of pathogen or inactivated/weakened pathogen (vaccine) are introduced into the body.

(b) A vaccine activates our immune system without making us sick. Many dangerous infectious diseases can be prevented in this simple and effective way. A vaccine activates our immune system without making us sick.

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Answer 2

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To understand how vaccines work and the basis of recommendations for their use, it is useful to have an understanding of the basic function of the human immune system. The following description is simplified. Many excellent immunology textbooks are available to provide additional detail.

Immunity is the ability of the human body to tolerate the presence of material indigenous to the body and to eliminate foreign substances. Immunity is generally specific to a single organism or group of closely related organisms. The discriminatory ability to eliminate foreign substances is performed by a complex system of interacting cells called the immune system. Since most organisms (such as bacteria, viruses, and fungi) are identified as foreign, the ability to identify and eliminate these substances provides protection from infectious disease.

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