NCIt definition : Refers to a person's state of physical, mental and social well-being; usually it refers
specifically to the state of being in good health, a state of complete physical, mental
and social well-being, and does not consist only of the absence of disease or infirmity.
In any organism health constitutes a form of homeostasis with inputs and outputs of
energy and mass in approximate equilibrium allowing for growth and continued survival.
In humans, a subjective feeling of well-being coming from somatic and cognitive perceptions
is considered an essential component of health.;