

Revision Questions : Work of a vaccine
Question 1: Which of the following criteria must be fulfilled for a vaccine to be effective?
- It contains an antigen that triggers the primary immune response but not causing disease.
- It must be lifetime lasting.
- It can induce both the humoral immune response and cell mediated immune response.
- It must be able to be administered intramuscularly.
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CORRECT! To trigger the formation of memory cells in the body is the most important criteria for a vaccine.
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INCORRECT! Whether it is lifetime lasting depends on how long the memory cells can persist.
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INCORRECT! Whether it is lifetime lasting depends on how long the memory cells can persist; it is not necessary to trigger both immune response everytime.
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INCORRECT! Whether it is lifetime lasting depends on how long the memory cells can persist; it is not necessary to trigger both immune response everytime; vaccine can be administered orally or through other routes.