LYCOS RETRIEVER 
Immunization
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Immunization, or [I]mmunisation, is the process by which an individual is exposed to an agent that is designed to fortify his or her immune system against that agent. The material is known as an immunogen. Immunization is the same as inoculation and vaccination in that inoculation and vaccination use a viable infecting agent like immunization does. When the human immune system is exposed to a disease once, it can develop the ability to quickly respond to a subsequent infection. Therefore, by exposing an individual to an immunogen in a controlled way, their body will then be able to protect itself from infection later on in life.
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Immunization is one of the most important steps you can take to ensure your baby's current and future health. Since immunization was first invented, it has saved hundreds of thousands of children's lives. This simple procedure involves the use of vaccines, which protect children from serious, and sometimes fatal infectious diseases by strengthening their immunity (their body's ability to fight off these diseases).
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Ivins BE, Welkos SL, Knudson GB et al: Immunization against anthrax with aromatic compound-dependent (Aro-) mutants of Bacillus anthracis and with recombinant strains of Bacillus subtilis that produce anthrax protective antigen. Infect Immun 58:303, 1990
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Immunization may be achieved by administering live or dead pathogens or their components. Vaccines used for active immunization consist of live (attenuated) organisms, killed whole organisms, microbial components or secreted toxins (which have been detoxified).
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Immunization