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vac·cine

vaccine

 
 
pronunciation:
vaek sin
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part of speech: noun
definition: a substance used to protect people and animals from very serious diseases. Vaccines contain germs of a particular disease--these germs been killed or changed in a certain way in a laboratory to make them safe. A vaccine goes into a person's body in a shot that is given by a doctor or nurse. After a vaccine is put into a person's body, that person will not get that disease or will get only a mild case.
Vaccines have saved the lives of millions of people since they were invented.Pet dogs get a vaccine every few years that prevents them from getting a serious disease called rabies. They could get rabies from the bite of a wild animal that has the disease.
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  disease, virus