what is the basis of principle of immunization?
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When a disease causing microbe enters our body our immune system responds against it.
when the same microbe or its close relative again enters our body our immune system responds against it vigorously and eliminates the microbe faster than before.
This is the principle of immunization.
when the same microbe or its close relative again enters our body our immune system responds against it vigorously and eliminates the microbe faster than before.
This is the principle of immunization.
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