Explain vaccination?
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Vaccination is the administration of a vaccine to help the immune system develop protection from a disease. Vaccines contain a microorganism or virus in a weakened, live or killed state, or proteins or toxins from the organism.
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A vaccine activates our immune system without making us sick. Many dangerous infectious diseases can be prevented in this simple and effective way. Get alerts about changes. From birth, we are constantly exposed to many different viruses, bacteria and other microbes.
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