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What is immunisation and how does it work?
Member rating: No Rating | Words: | Submitted: Fri Dec 12 2003
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Task 1 What is immunisation and how does it work? Immunisation is the process of rendering people immune to an infectious organism by inoculating them with a form of the organism that does not cause severe disease but does provoke formation of protective antibodies. Vaccines are the most effective protection against most diseases caused by viruses and related organisms, because few antibiotics work against them. Immunisation uses the body's natural defence mechanism-the immune response-to build resistance to specific infections. Immunisation is given as an injection or, in the case of polio vaccine, taken as drops by mouth. Immunisation helps children stay healthy by preventing serious infections. Immunisation works by introducing a mild or dead form of the disease into the body. Some vaccines contain a very small dose of a live, but weakened form of a virus. Some vaccines contain a very small dose of killed bacteria or small parts...
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