Health is often the highest value for us, ranking higher than wealth in the hierarchy of values. It is also a resource with which we can realise our goals and plans. There is no single definition of health, it is a multidimensional concept because of the holistic approach to the human being, because of the scientific discipline that undertakes the formulation of such a definition, and because of all the cultural factors.[1]

The World Health Organisation (WHO) definition states that health is not just a state without ailments. This definition goes wider, as it says that we can only call health full well-being (biological, mental and social). Another definition of health also points out that in addition to being a state without disease, it is also a certain system of positive qualities that help a person to achieve his or her goals.[2]
Considering the biological realm, health is a state of the body where all structures and systems are functioning properly.[3]

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Health considered as a state of normality and normal functioning of the organism, points to a biomedical model that bases its definition on pathology as the other pole of health (health-disease). This concept is now considered a negative concept due to defining health through the lens of the absence of pathology.