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(B) Passive immunity is the type of immunity where pre-formed antibodies are directly introduced into the body,rather than the body producing them in

Vedclass · Accepted Answer

Polio vaccine

Vedclass · Answer

(B) Passive immunity is the type of immunity where pre-formed antibodies are directly introduced into the body,rather than the body producing them in response to an antigen. $A$. Anti-serum contains pre-formed antibodies and is a form of passive immunity. $B$. Polio vaccine contains weakened or inactivated pathogens that stimulate the body to produce its own antibodies,which is an example of active immunity,not passive. $C$. The transfer of $IgG$ from mother to fetus through the placenta is a natural passive immunity. $D$. The transfer of $IgA$ from mother to infant through colostrum is also a natural passive immunity. Therefore,the polio vaccine is the correct answer as it induces active immunity.

Which of the following cannot be included in passive acquired immunity?

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