What is the term for acquiring antibodies through receiving an injection?

The term for acquiring antibodies through receiving an injection is passive immunity. This process involves the introduction of antibodies from another source, which can be either human or animal origin. When someone receives an injection of antibodies, their immune system does not produce them; rather, it is supplied with pre-formed antibodies that help fight off specific pathogens immediately. This is particularly useful in situations where rapid immune response is necessary, such as in the case of exposure to certain diseases or toxins.

Passive immunity differs from active immunity, where the immune system is stimulated to produce its own antibodies, typically through natural infection or vaccination. The injection described in the question provides immediate protection but does not confer long-lasting immunity because the body does not create memory cells that would protect against future infections.

Other options refer to different concepts: artificial refers more generally to human-made interventions (such as vaccines), innate describes the natural defenses we are born with, and active implies that the body is creating its own response rather than receiving it from an external source.