Question

What is a vaccine?

A

Treated bacteria, virus or protein

B

Treated algae

C

Activated fungi

D

Plant preparation

Medium
Solution
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Correct option is A)

Correct Answer: A
Explanation:

  • A vaccine is a biological preparation that provides active acquired immunity to a particular disease.
  • A vaccine typically contains an agent that resembles a disease-causing microorganism and is often made from weakened (attenuated) or killed forms of the microbe, its toxins or one of its surface proteins.
  • The agent stimulates the body's immune system to recognize the agent as a threat, destroy it and keep a record of it so that the immune system can more easily recognize and destroy any of these microorganisms that it later encounters.

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