Artificial immunity is developed

Artificial immunity is developed

• A. through vaccination rather than exposure
• B. when an individual has been infected with the disease
• C. from the body's antigen-antibody response to infection
• D. when the immune system is compromised

Answer: (A)

Artificial immunity is immunity produced by vaccination, which introduces a safe form of the antigen—such as a weakened or inactivated pathogen or a protein component—to stimulate the immune system to respond and develop memory without causing disease. This controlled exposure trains B cells and T cells, so when the real pathogen is encountered later, the body can mount a faster and stronger defense. The other ideas describe natural immunity, which comes from actually having the disease or from the body’s normal antigen-antibody response to infection, and immunity resulting from an impaired immune system, which is not artificial. Vaccination provides protection without the person suffering the illness, which is why it is the method of creating artificial immunity.

Artificial immunity is immunity produced by vaccination, which introduces a safe form of the antigen—such as a weakened or inactivated pathogen or a protein component—to stimulate the immune system to respond and develop memory without causing disease. This controlled exposure trains B cells and T cells, so when the real pathogen is encountered later, the body can mount a faster and stronger defense.

The other ideas describe natural immunity, which comes from actually having the disease or from the body’s normal antigen-antibody response to infection, and immunity resulting from an impaired immune system, which is not artificial. Vaccination provides protection without the person suffering the illness, which is why it is the method of creating artificial immunity.