What are the two broad types of acquired immunity?

• A. Passive and innate immunity
• B. Active and active immunity
• C. Active acquired immunity and passive acquired immunity
• D. Immediate and delayed immunity

Answer: (C)

The two broad types of acquired immunity are active acquired immunity and passive acquired immunity. Active acquired immunity refers to the immunity that develops as a result of exposure to pathogens or antigens, leading to the production of specific antibodies by the immune system. This type can occur through natural infection or through vaccination, where the body learns to recognize and tackle specific pathogens.

On the other hand, passive acquired immunity is provided when antibodies are transferred from one individual to another. This can happen naturally, such as when a mother transfers antibodies to her infant through breast milk, or artificially, through the administration of antibody-containing serum. Passive immunity offers immediate protection but does not result in long-term immunity since the body does not produce its own antibodies.

Understanding these two types of acquired immunity is crucial in the study of the immune system, as they play different roles in how the body defends itself against infections, highlighting the dynamic and adaptive nature of the immune response.