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Question
What is vaccination? Mention the four ways in which vaccines are prepared, giving the name of one disease for which each type of vaccine is used.
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Solution
Vaccination is the administration of a vaccine to help the immune system develop protection from a disease.
The four ways in which vaccine are prepared are-
- Killed germs used for preparing vaccines. Eg. TAB vaccine for typhoid.
- Living weakened germs are treated in a way that they become weak and cannot cause disease. They are then used for preparing vaccines. Eg. BCG vaccine for Tuberculosis.
- Living fully virulent germs used for preparing vaccines. Eg. Smallpox or Cowpox vaccine.
- Toxoids are toxins extracted from bacteria or virus used for preparing vaccines. Eg. Diptheria.
The four ways in which vaccine are prepared are-
- Killed germs used for preparing vaccines. Eg. TAB vaccine for typhoid.
- Living weakened germs are treated in a way that they become weak and cannot cause disease. They are then used for preparing vaccines. Eg. BCG vaccine for Tuberculosis.
- Living fully virulent germs used for preparing vaccines. Eg. Smallpox or Cowpox vaccine.
- Toxoids are toxins extracted from bacteria or virus used for preparing vaccines. Eg. Diptheria.
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