Summary of types of specific immunity

Type of specific immunityExample of how immunity might be acquired
Naturally acquired immunity Active Infection
Passive Maternal antibodies crossing the placenta, or in breastmilk
Artificially acquired immunity Active Intentional exposure to antigens in a vaccine
Passive Injection or transfusion of someone else’s antibodies

You give a polio vaccination containing polio antigens to a baby girl. What type of immunity will the child develop? Explain your answer.

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The child will develop artificially acquired active immunity. She was deliberately exposed to polio antigens in the vaccine, so her immunity is artificially acquired. She produced her own antibodies and memory cells directed against the polio antigens, so her immunity is active.

Last modified: Saturday, 24 May 2014, 12:41 PM