A child receives a vaccine and develops protection against the microorganism several weeks later. Which type of immunity has been produced?
Correct answer: A. Artificial active immunity
- A. Artificial active immunity
- B. Natural passive immunity
- C. Artificial passive immunity
- D. Natural active immunity
Explanation
Vaccination introduces antigenic material that stimulates the person's own immune system to form antibodies and memory cells, so it produces artificial active immunity. Passive immunity results from receiving ready-made antibodies and usually does not create lasting immune memory.
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About Blood and Immunity
Blood and immunity covers plasma, red blood cells, white blood cells, platelets, haemoglobin, blood groups and haemostasis. It explains innate and adaptive defenses, antibodies, lymphocytes, inflammation, vaccination and immune memory, with a distinction between active and passive immunity and between antigen and antibody.
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