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Question : State the three characteristics of Acquired Immunity. List the different ways by which it can be attained by humans.

Answer»

SOLUTION :The following are the characteristics of ACQUIRED immunity.
(i) It is PATHOGEN specific.
(ii) It is characterized by memory.
(iii) Responses can be characterized as a primary response of low intensity and an intensified secondary or anamnestic response.
Acquired immunity can be attained in the following ways :
(i) ACTIVE immunity : Here ANTIBODIES are produced in the host body in response to dead or liviing microbes or other proteins. Here onset of response in slow.
(ii) Passive immunity : Here ready made antibodies are directly given to product the body against foreign agents.


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