23. How do vaccines work?
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Vaccines contain weakened or inactive parts of a particular organism (antigen) that triggers an immune response within the body. Newer vaccines contain the blueprint for producing antigens rather than the antigen itself
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The vaccine is a simple device used to inject a Medicine to the animals and humans.
They have a barrel, In that they fill medicine And A Pushing stick that will push the medicine in the barrel To a pin like structure that is very sharp . This makes the structure of an Vaccine.
For injecting a medicine the Pin part of the vaccine will be Inserted to the body
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