Question

a vaccine provides immunity how ?
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Answer 1

Answer:

immune system reacts to the vaccine in a similar way that it would if it were being invaded by the disease — by making antibodies

Answer 2

Answer:

A vaccine works by training the immune system to recognize and combat pathogens, either viruses or bacteria. To do this, certain molecules from the pathogen must be introduced into the body to trigger an immune response. These molecules are called antigens, and they are present on all viruses and bacteria.

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