what is vaccine and vaccination
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Answer:Vaccines are in the form of oral drops or injections.Vaccines contain weak or dead germs of a certain diseases.When a person is vaccinated the germs enter the body and prepare the body to fight against these germs or pathogens.
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if dead or weakend microbes are introduced into a healthy body, the body fights and kills the invading bacteria by producing suitable antibiotic. the antibiotics remain in the body and we were protected from the disease causing microbes forever. this is how vaccine work
serveral diseases including chlorella smallpox can be prevented by vaccination
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