Immunity that develops over a person’s lifetime is called what?

Immunity that develops over a person’s lifetime is called what?

• A. Acquired Immunity
• B. Passive Immunity
• C. Natural Immunity
• D. Innate Immunity

Answer: (A)

Acquired immunity is the adaptive part of the immune system that develops as a person is exposed to pathogens or receives vaccines. Each encounter teaches the body to recognize specific invaders, producing targeted antibodies and memory cells. That memory means responses become faster and stronger with future exposures, and this learning can continue throughout life. This differs from innate immunity, which is the body's general, built-in defense present from birth, and from passive immunity, which is borrowed from another source and is temporary.

Acquired immunity is the adaptive part of the immune system that develops as a person is exposed to pathogens or receives vaccines. Each encounter teaches the body to recognize specific invaders, producing targeted antibodies and memory cells. That memory means responses become faster and stronger with future exposures, and this learning can continue throughout life. This differs from innate immunity, which is the body's general, built-in defense present from birth, and from passive immunity, which is borrowed from another source and is temporary.