What are vaccines? What do they contain? How do they protect us from diseases?
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Answer:
Vaccines: The Basics
Some vaccines contain only a part of the disease germ. A vaccine stimulates your immune system to produce antibodies, exactly like it would if you were exposed to the disease. After getting vaccinated, you develop immunity to that disease, without having to get the disease first.
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Answer:
a vaccine
Explanation: is a thing admisterated in your body to help in immune system
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