Question

3. What does a vaccine consist of? How does a vaccine work?
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Answer 1

Answer:

3. A vaccine typically contains an agent that resembles a disease-causing microorganism and is often made from weakened or killed forms of the microbe, its toxins, or one of its surface proteins.

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.

Answer 2

Answer:

A vaccine typically contains an agent that resembles a disease-causing microorganism and is often made from weakened or killed forms of the microbe

vaccines produce antibodies to fight and kill disease causing microorganisms..these antibodies also remember to do the same whenever the particular microbe enters the body in future, thus ensuring protection against that particular disease

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