what is vaccine and how it prepared
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- Using this strategy, viruses are weakened so they reproduce very poorly once inside the body. The vaccines for measles, mumps, German measles (rubella), rotavirus, oral polio (not used in the U.S.), chickenpox (varicella), and influenza (intranasal version) vaccines are made this way. Viruses usually cause disease by reproducing themselves many times in the body. Whereas natural viruses reproduce thousands of times during an infection, vaccine viruses usually reproduce fewer than 20 times. Because vaccine viruses don't reproduce very much, they don't cause disease, but vaccine viruses replicate well enough to induce "memory B cells" that protect against infection in the future. Find out more about these and other cells of the immune system.
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Vaccine is a substance used to stimulate the production of antibodies and provide immunity against one or several diseases. Prepared Vaccines are in a clean, designated medication area away from where the patient is being vaccinated and away from any potentially contaminated item
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