Answer:
Immunity
means the resistance of the body to a disease. It is due to the presence of
antibodies in our body against the disease-causing microorganisms known as
antigens. When these antigens enter our body, antibodies are formed which
prevent the disease.
Natural immunity means that a person has these antibodies since birth, e.g.,
whenever antigens, say of cholera enter the body, the person will not suffer from
the disease.
Acquired immunity means that when a person suffers from a
disease once, antibodies for these particular disease-causing antigens will be
formed in the body and he will not get the same disease again.
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