Multiple choice

When a microbe enters the body for the second time, the immune system acts and eliminates it quicker than the first time. What is this principle called?

  1. Principle of immunisation

  2. Principle of infection

  3. Principle of prevention

  4. Principle of disease spread
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A Correct answer
Explanation

The second time, our immune system has memory cells which quickly identify the problem and counter it and thus, eliminate it. This is called immunisation. Immunisation is a method of prevention of disease or infection and it also helps to avoid the spreading of a disease.

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