Health, like love or happiness is a quality of life that is difficult to define and virtually impossible to measure.
Health is defined differently among experts, but all definition have a common theme: self responsibility and adopting a healthy life style.
Health is a state of complete physical, mental and social well-being and not merely the absence of disease or uniformity – World Health Organization, 1947.
Wellness has been defined as: an approach to personal health that emphasize individual responsibility for well being through the practice of health promoting lifestyle behaviors. – Hurley and Schlaadt, 1992.
Wellness is many times referred to in a broader context than health which sometimes means only physical health.