Artificially acquired passive immunity occurs when

• A. Vaccination
• B. Antibodies from mother to fetus
• C. When your body makes antibodies
• D. injecting someone with antibiotics

Answer: (D)

Artificially acquired passive immunity happens when antibodies are given directly to a person, providing immediate protection without that person’s immune system having to make its own antibodies. This is done by injecting immune globulins or antisera, which supply the needed antibodies right away. The protection is usually short-lived because the administered antibodies are eventually cleared from the body, and no long-term immune memory is established. This differs from active immunity, where the person’s own immune system is stimulated to produce antibodies (such as through vaccination) and from natural passive immunity, where antibodies pass from mother to child. Antibiotics, on the other hand, are drugs that treat bacterial infections—they do not confer immunity by providing antibodies.