Immunologic Tolerance Is Defined As

question 3

Multiple Choice

Immunologic tolerance is defined as:

• A)The removal of an antigen,or the microbes expressing the antigen,by the immune system,so that the host can tolerate the infection
• B)Activation of only B cells,and not T cells,on exposure to an antigen
• C)Unresponsiveness of the immune system to an antigen,which is induced by previous exposure to that antigen
• D)The production of memory B cells and T cells on primary exposure to an antigen,which allows the host to tolerate a secondary exposure to the antigen
• E)Vaccination of individuals against particular pathogens to prevent subsequent infections

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