Active acquired immunity is gained:
A) in utero.
B) after birth.
C) via injection of specific antibodies.
D) in adulthood.

Question

Quizplus · Accepted Answer

Active acquired immunity is gained after birth, when the immune system is exposed to antigens through natural infection or vaccination. In utero, the fetus is protected by maternal antibodies, which provide passive immunity for the first months of life. The injection of specific antibodies provides passive immunity, but does not stimulate the production of long-lasting memory cells that are characteristic of active acquired immunity. While immunity can change and decline with age, it is typically established after exposure to antigens in childhood and adolescence.

Active Acquired Immunity Is Gained