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prevention (pre-ven´shun)   the keeping of something (such as an illness or injury) from happening.
 

primary prevention  the first level of health care, designed to prevent the occurrence of disease and promote health.

secondary prevention  the second level of health care, based on the earliest possible identification of disease so that it can be more readily treated or managed and adverse sequelae can be prevented.

tertiary prevention  the third phase or level of health care, concerned with promotion of independent function and prevention of further disease-related deterioration.





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