Which of the following is an example of artificially acquired active immunity? Select all that apply
A) An individual who is exposed to chickenpox for the first time and has no immunity to the disease
B) Administration of the varicella vaccine to an individual who has no immunity to the disease
C) An individual who is exposed to pertussis for the first time and has no immunity to the disease
D) Administration of the influenza vaccine to an individual who has no immunity to the disease
E) Administration of the rubella vaccine to an individual who has no immunity to the disease
Ans: B, D, E
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Artificially acquired active immunity occurs when an individual is given a killed or weakened antigen, which stimulates the formation of antibodies against the antigen. The antigen does not cause the disease, but the individual still manufactures specific antibodies against the disease. Administration of the varicella vaccine, administration of the influenza vaccine, and administration of the rubella vaccine to an individual who has no immunity to the disease are examples of artificially acquired active immunity. Naturally acquired active immunity occurs when the person is exposed to and experiences a disease and the body manufactures antibodies to provide future immunity to the disease.
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