Which statement is correct for active immunity?
A) It is self-generated upon exposure to antigen.
B) It can be produced only as a result of a person actually having the disease.
C) It involves administration of preformed antibodies.
D) It is acquired in the newborn as a result of the transfer of antibodies across the placenta during intrauterine development.

Question

Quizplus · Accepted Answer

Active immunity is generated when the body's own immune system is stimulated through exposure to an antigen. This can occur through natural exposure to an infectious agent or through vaccination. The body produces its own antibodies and immune memory cells, providing long-lasting protection against future infections.

Which Statement Is Correct for Active Immunity