Question:
What is a vaccine? Write the basis on which it acts when administered in the body.
What is a vaccine? Write the basis on which it acts when administered in the body.
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Vaccines are crucial for preventing infectious diseases and promoting global health.
Updated On: Jan 13, 2026
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Solution and Explanation
A vaccine is a biological preparation that provides active acquired immunity to a particular disease.
Contains inactivated or weakened pathogens/antigens.
Stimulates the immune system to produce memory cells for future protection.
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