Laser Technician IBEC Board Exam 2025 - Free International Board of Electrologist Certification Practice Questions.

Acquired immunity is a type of immunity that develops specifically after an individual is exposed to a pathogen or an antigen, or after receiving a vaccine. This form of immunity involves the immune system's ability to remember previous encounters with pathogens, leading to a more rapid and effective response upon subsequent exposures.

When a person overcomes a disease, their immune system has encountered the pathogen and has produced specific antibodies and memory cells tailored to that pathogen. Similarly, vaccinations introduce a harmless form or part of a pathogen to the immune system, prompting it to generate a similar immune response, thus preparing the body for future encounters with the actual pathogen. This memory enables the body to respond more effectively and quickly if the pathogen is encountered again.

Receiving a blood transfusion does not confer acquired immunity, as this process involves the transfer of blood components rather than the development of a targeted immune response. Exposure to environmental toxins or sudden changes in climate does not stimulate the immune system in a way that results in the development of acquired immunity.