Preventive Medicine (alternately Preventive healthcare or prophylaxis) consists of measures taken for disease prevention, as opposed to disease treatment. Just as health comprises a variety of physical and mental states, so do disease and disability, which are affected by environmental factors, genetic predisposition, disease agents, and lifestyle choices. Health, disease, and disability are dynamic processes which begin before individuals realize they are affected. Disease prevention relies on anticipatory actions that can be categorized as primal, primary, secondary, and tertiary prevention.
Primal and primordial prevention A separate category of "health promotion" has recently been propounded. This health promotion par excellence is based on the 'new knowledge' in molecular biology, in particular on epigenetic knowledge, which points to how much affective - as well as physical - environment during fetal and newborn life may determine each and every aspect of adult health. This new way of promoting health is now commonly called primal prevention.
Primary prevention Primary prevention consists of traditional "health promotion" and "specific protection." Health promotion activities are current, non-clinical life choices. For example, eating nutritious meals and exercising daily, that both prevent disease and create a sense of overall well-being. Preventing disease and creating overall well-being, prolongs our life expectancy. Health-promotional activities do not target a specific disease or condition but rather promote health and well-being on a very general level. On the other hand, specific protection targets a type or group of diseases and complements the goals of health promotion.
Secondary prevention Secondary prevention deals with latent diseases and attempts to prevent an asymptomatic disease from progressing to symptomatic disease.[15] Certain diseases can be classified as primary or secondary. This depends on definitions of what constitutes a disease, though, in general, primary prevention addresses the root cause of a disease or injury whereas secondary prevention aims to detect and treat a disease early on.[28] Secondary prevention consists of "early diagnosis and prompt treatment" to contain the disease and prevent its spread to other individuals, and "disability limitation" to prevent potential future complications and disabilities from the disease.
Tertiary prevention Finally, tertiary prevention attempts to reduce the damage caused by symptomatic disease by focusing on mental, physical, and social rehabilitation. Unlike secondary prevention, which aims to prevent disability, the objective of tertiary prevention is to maximize the remaining capabilities and functions of an already disabled patient. Goals of tertiary prevention include: preventing pain and damage, halting progression and complications from disease, and restoring the health and functions of the individuals affected by disease.