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7.Human Health and Disease
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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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