What is the basic principle of vaccination class 9


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What is the basic principle of vaccination?

Answered by admin @



In vaccination, a mild form of microbes of infected disease is injected as vaccine into a healthy person. When the immune system of that person first comes in contact with any infectious microbe, it responds against it, and the next time if that microbe enters the body, the immune system responds to it with even greater vigour. This eliminates the infection more rapidly. This is the basic principle of immunization.

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