Immunization
The process of making a person resistant to an infectious disease, usually by administering a vaccine that trains the immune system to recognize and fight a specific pathogen. It is a cornerstone of preventive public health and outbreak control.
What is immunization?
Immunization is the process of making a person resistant to an infectious disease, most often by giving a vaccine that prompts the immune system to recognize and respond to a specific pathogen. The body builds a protective memory so it can react quickly if it later encounters the real organism.
Although the terms are sometimes used interchangeably, vaccination refers to administering the vaccine, while immunization describes the protective immunity that results. Some immunization is also achieved by providing ready-made antibodies for shorter-term protection.
Why does immunization matter for public health?
Immunization is one of the most effective tools in preventive medicine, reducing the burden of diseases that once caused widespread illness and death. When enough of a population is immunized, transmission slows and even unvaccinated individuals gain some indirect protection.
Beyond individual protection, immunization supports outbreak control and patient safety across care settings. Maintaining up-to-date immunization records helps clinicians assess risk and protect vulnerable patients and staff.
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