Question:
Reason for introducing vaccine into the body is ___________.
Reason for introducing vaccine into the body is ___________.
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A vaccine contains a weakened or inactive antigen that prepares the immune system.
Updated On: Nov 13, 2026
to stimulate the formation of antibody.
to suppress allergic reactions.
to differentiate different T lymphocytes.
to immobilise engulfed phagocytes.
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept
A vaccine contains inactivated or weakened pathogens or their proteins.
Step 2: Key Point
When introduced, the vaccine does not cause disease but triggers the B cells and T cells to make antibodies and memory cells.
Step 3: Compare the options
On later infection the body responds quickly.
So the reason is to stimulate the formation of antibodies.
Final Answer:
A vaccine is given to stimulate antibody formation. \[ \boxed{\text{(A) }\text{to stimulate the formation of antibody.}} \]
A vaccine contains inactivated or weakened pathogens or their proteins.
Step 2: Key Point
When introduced, the vaccine does not cause disease but triggers the B cells and T cells to make antibodies and memory cells.
Step 3: Compare the options
On later infection the body responds quickly.
So the reason is to stimulate the formation of antibodies.
Final Answer:
A vaccine is given to stimulate antibody formation. \[ \boxed{\text{(A) }\text{to stimulate the formation of antibody.}} \]
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