The term ?active immunity' means [CBSE PMT 1999; BHU 1999]
A) Resistance developed after disease
B) Resistance developed before disease
C) Resistance rate of heart beat
D) Increasing quantity of blood
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answer is A, because when the pathogen or any antigen enters our body then it
produces Anti bodies against it and also remembers the disease by our memory
cells . so again on its reintroduction in our body , it actively vanishes it because
of our memory cells. so basically , the immunity which results from the
production of antibodies by the immune system in response to the presence of
an antigen is Active immunity.
produces Anti bodies against it and also remembers the disease by our memory
cells . so again on its reintroduction in our body , it actively vanishes it because
of our memory cells. so basically , the immunity which results from the
production of antibodies by the immune system in response to the presence of
an antigen is Active immunity.
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