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NEET2011ZoologyHuman Health and DiseasesActual

Active immunity means

Options

  1. Aresistance developed after disease
  2. Bincreasing quantity of blood
  3. Cresistance developed before disease
  4. Dincreasing rate of heart-beat

Correct answer

A. resistance developed after disease

Step-by-step solution

Immunity is described as an 'active immunity' when an organism's own body manufactures its own antibodies. It may be natural (developing when organism is exposed to an infectious agent) or artificial (achieved by injecting small amount of antigen called vaccine into the body of the individual).

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