Question

Which type of immunity is acquired through the administration of a vaccine?

• A. Natural active immunity
• B. Natural passive immunity
• C. Artificial active immunity
• D. Artificial passive immunity

Hint:

Vaccination = \textbf{Artificial + Active}. Body produces its own antibodies after exposure.

Answer 1

The Correct Option is C

Concept: Immunity is the body's ability to resist infections. It is broadly classified into active and passive immunity, each of which can be natural or artificial:

• Natural active immunity: Acquired through natural infection.
• Natural passive immunity: Transfer of antibodies from mother to child (e.g., placenta, breast milk).
• Artificial active immunity: Induced by vaccines.
• Artificial passive immunity: Injection of pre-formed antibodies (e.g., antiserum).

Vaccines contain weakened or inactivated pathogens (or their components) that stimulate the immune system to produce antibodies and memory cells.
Step 1: Understand how vaccines work.
Vaccines trigger the body's immune response without causing disease, leading to the formation of memory cells.
Step 2: Identify the type of immunity.
Since immunity is developed actively by the body and is artificially induced, it is classified as artificial active immunity.
Step 3: Differentiate from other types.

• Passive immunity involves receiving ready-made antibodies.
• Natural immunity occurs without medical intervention.

Step 4: Conclude the answer.
Thus, immunity acquired through vaccination is artificial active immunity.