1. Tardigrade
  2. Question
  3. Biology
  4. Which of the following statements regarding vaccination and immunisation are correct? I. The principle of vaccination is based on the 'memory' of the immune system. II. The antibodies produced in the body against antigens neutralise the pathogenic agents before the actual infection. III. Hepatitis B vaccine is prepared by using a virus in recombinant DNA technology. IV. Antibodies are given directly in case of infection with deadly microbes to elicit quick immune response.

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Q. Which of the following statements regarding vaccination and immunisation are correct?
$I.$ The principle of vaccination is based on the 'memory' of the immune system.
$II.$ The antibodies produced in the body against antigens neutralise the pathogenic agents before the actual infection.
$III.$ Hepatitis B vaccine is prepared by using a virus in recombinant DNA technology.
$IV.$ Antibodies are given directly in case of infection with deadly microbes to elicit quick immune response.

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Solution:

$II.$ The antibodies produced in the body against antigens neutralise the pathogenic agents during the initial infection itself and prevent further infection.
$III$ . Hepatitis B vaccine is prepared by using yeast in recombinant DNA technology.