a complete state of physical, mental, and social well-being and not merely the absence of disease or infirmity — World Health Organization (1948)
it is a balance among physical, mental, and social well-being
So, health is -
- absence of disease
- proper functioning of organs and systems
- able to do daily activities without limitations
- has many components; mental, physical, and social
involves aspects such as regular exercise, balanced nutrition, sufficient sleep, and the absence of physical symptoms or illnesses.
wellness = usually means optimum state of health
Illness
Illness on the other hand is
- deviation from normal well-being
- presence of disease or physical symptoms
- poor health
- impaired functioning
According to WHO,
“Illness is a state in which a person’s physical, intellectual, emotional, social or spiritual functioning is diminished or impaired in comparison with the previous experience”.”
It is a state of poor health where normal functioning of the body is disrupted