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STD 12 - 7. human health and disease — BIOLOGY STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceBIOLOGYSTD 12 - 7. human health and disease1 Mark
MCQ
Active immunity may be acquired by
  • A
    Natural infection
  • B
    Vaccines
  • C
    Toxoids
  • ✓
    All of these
✓

Answer

Correct option: D.
All of these
d
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

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