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Number 1. acquired through an immune response (development of antibodies) when the body is exposed to the pathogen.  It can be of natural or artificial mechanisms

Correct Answer: active immunity

Number 2. acquired through the transfer of antibodies from an immune individual to a nonimmune one. The individual does not create the antibodies, but receives them, and is only immune while receiving the antibodies

Correct Answer: passive immunity

Number 3. occurs when a person is exposed to a live pathogen, and develops a primary immune response, which leads to immunological memory

Correct Answer: natural active immunity

Number 4. achieved through artificial means such as is the case with immunizations or vaccine injections. A person is injected with a weakened strain of the pathogen to prompt the body to produce antibodies and memory cells for immunity.

Correct Answer: artificial active immunity

Number 5. the transfer of antibodies from the maternal circulation to the fetus via the placenta, protecting the fetus from infection and protecting the newborn for the first few months of its life

Correct Answer: natural passive immunity

Number 6. usually involves injections of immunoglobulins (or antibodies) taken from animals previously exposed to a specific pathogen

Correct Answer: artificial passive immunity