In Passive Immunity, The

Question

In passive immunity, the
A) immune system attacks normal body cells.
B) body is deliberately exposed to an antigen.
C) body receives antibodies produced by other humans.
D) body receives antibodies produced by an animal.
E) body receives antibodies produced by other humans or by an animal.

Accepted Answer

Passive immunity involves the transfer of active humoral immunity in the form of ready-made antibodies, from one individual to another. This can occur naturally, as in the case of maternal antibodies transferred to the fetus through the placenta, or artificially, through the administration of antibodies to fight a disease. These antibodies can be sourced from humans who have recovered from the disease or from animals that have been immunized against the disease. Therefore, both options C and D are correct, making E the most comprehensive and accurate choice.