Artificial immunity can be acquired from -

Serious illness

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Repeated exposure to the same microbe

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Treatment with penicillin

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Vaccination

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Solution

The correct option is D Vaccination
Artificially acquired active immunity is protection produced by intentional exposure of a person to antigens in a vaccine, so as to produce an active and lasting immune response.
So, it is acquired by vaccination. Vaccines contain the antigen which contains live pathogens. Thus, they provide primary immune response.

So, the correct answer is-vaccination.

Suggest Corrections

	LIST I		LIST II
a	Natural active immunity	i	Develops due to to vaccinaton
b	Natural passive immunity	ii	Antirabies serum
c	Artificial active immunity	iii	Acquired after smallpox infection
d	Artificial passive immunity	iv	Transferred from mother to child