Which one of these is a characteristic of artificial active immunity?

• A. Acquired through antibody transfer
• B. Develops after recovering from an infection
• C. Induced by vaccination
• D. Involves maternal antibody transfer

Answer: (C)

Artificial active immunity is characterized by the immune response generated in the body following exposure to a harmless form of an antigen, typically through vaccination. When a vaccine is administered, it stimulates the body's immune system to produce antibodies and memory cells against that specific pathogen without causing the actual disease. This means that if the person later encounters the actual pathogen, their immune system can respond more effectively and quickly due to the memory cells that were created in response to the vaccine.

The concept is distinct from natural immunity, which occurs when an individual recovers from a natural infection and develops immunity as a result of the body fighting off the disease. Options that describe situations involving antibody transfer or maternal antibody transfer relate more to passive immunity, where antibodies are given to a person rather than the person’s own immune system being stimulated to produce them. Thus, the characteristic of induced immunity through vaccination aligns perfectly with the definition of artificial active immunity.