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Question

What is a vaccine?


A

A liquid containing dead pathogen

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B
A liquid containing a weakened pathogen
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C

A liquid containing a attenuated pathogen

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D

All of the above

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Solution

The correct option is D

All of the above


Vaccines interact with the immune system and often produce an immune response similar to that produced by natural infection, but they do not expose the recipient to the disease and its potential complications. So, for making vaccines, dead or weakened (attenuated) versions of the pathogen are used which mimic the live pathogen and yet, are unable to establish infection.


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