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Immunization
Pronunciation
Definition 1
A technique used to cause an immune response that results in resistance to a specific disease, especially an infectious disease. (NCI Dictionary)
Definition 2
Inoculating an individual with either killed or live agents to prevent contraction of a disease. (NCI Thesaurus)
More information
Shots may hurt a little, but the diseases they can prevent are a lot worse. Some are even life-threatening. Immunization shots, or vaccinations, are essential. They protect against things like measles, mumps, rubella, hepatitis B, polio, diphtheria, tetanus, and pertussis (whooping cough). Immunizations are important for adults as well as children.
Your immune system helps your body fight germs by producing substances to combat them. Once it does, the immune system "remembers" the germ and can fight it again. Vaccines contain germs that have been killed or weakened. When given to a healthy person, the vaccine triggers the immune system to respond and thus build immunity.
Before vaccines, people became immune only by actually getting a disease and surviving it. Immunizations are an easier and less risky way to become immune. (NIH: National Institute of Allergy and Infectious Diseases)
Also called: Vaccination
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