Gujarati
Hindi
7.Human Health and Disease
medium

Active immunity may be acquired by

A

Natural infection

B

Vaccines

C

Toxoids

D

All of these

Solution

When a host is exposed to antigens. Which may be in the form of living or dead microbes or proteins, antibodies are produced in the host body. This type of immunity is called active immunity. All the three options are via media through, which an antigen enters into host body

Standard 12
Biology

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