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UcJLIUII 20(I PUIUL) True or False: In order for herd immunity to work a large proportion of the population needs to be vacci
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Question 28 :- Answer: Option - b (True)

Herd immunity is defined as the resistance to the spread of a contagious disease within a population that results if a sufficiently high proportion of individuals are immune to the disease, especially through vaccination.

Question 29:- Answer: Option - c (Signal cells to produce anti-viral proteins)

Interferons are a group of signaling proteins made and released by host cells in response to the presence of several viruses.

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