Which statement correctly describes active immunization as it relates to long-term immunity?

Which statement correctly describes active immunization as it relates to long-term immunity?

• A. Immediate protection.
• B. Long-term immunity by stimulating antibody production.
• C. Transfer of antibodies from another individual.
• D. No immune response.

Answer: (B)

Active immunization trains the body's own immune system to recognize and fight a pathogen by presenting it with an antigen. This prompts B cells to produce antibodies and, crucially, to form memory B and T cells that persist over time. Those memory cells enable a faster and stronger response if the real pathogen is encountered again, providing lasting immunity. The description “long-term immunity by stimulating antibody production” fits this process, because it emphasizes the immune system generating its own antibodies and preserving memory for future protection. In contrast, transferring antibodies from another person gives immediate protection but does not create lasting immune memory, so it’s a form of passive immunization rather than active.

Active immunization trains the body's own immune system to recognize and fight a pathogen by presenting it with an antigen. This prompts B cells to produce antibodies and, crucially, to form memory B and T cells that persist over time. Those memory cells enable a faster and stronger response if the real pathogen is encountered again, providing lasting immunity. The description “long-term immunity by stimulating antibody production” fits this process, because it emphasizes the immune system generating its own antibodies and preserving memory for future protection. In contrast, transferring antibodies from another person gives immediate protection but does not create lasting immune memory, so it’s a form of passive immunization rather than active.