Which type of immunity is acquired by contact with a disease organism?

• A. Artificial immunity
• B. Innate immunity
• C. Passive acquired immunity
• D. Active acquired immunity

Answer: (D)

Verified step by step guidance

1. Understand the types of immunity: Innate immunity is the natural defense present from birth, not acquired through exposure to pathogens.
2. Recognize that artificial immunity is gained through medical interventions like vaccines, not by natural contact with the disease organism.
3. Passive acquired immunity involves receiving antibodies from another source, such as maternal antibodies or antibody injections, rather than producing them yourself.
4. Active acquired immunity occurs when the immune system is exposed to a disease organism and responds by producing its own antibodies and memory cells.
5. Therefore, the immunity acquired by direct contact with a disease organism is active acquired immunity, as the body actively responds to the infection.