Question

Passive immunity is defined as immunity

• A. Inherited from the parents
• B. Achieved through vaccination
• C. Acquired through first exposure to the disease
• D. Achieved through the sera of other animals enriched in antibodies

Answer 1

The correct option is D Achieved through the sera of other animals enriched in antibodies

Naturally acquired passive immunity occurs during pregnancy, in which certain antibodies are passed from the maternal to the fetal bloodstream. Artificially acquired passive immunity is a short-term immunisation by the injection of antibodies such as gamma globulin, that are not produced by the recipient's cells. So, in short, passive immunity is the transfer of active humoral immunity in the form of ready-made antibodies from the sera of one individual to another.
So, the correct answer is option D.