The physical, mental, social as well as the emotional well-being of an individual pertaining naturally without the impact of any externally administrated drug or external influence.
It is the state where no diseases of any form (physical, mental, social, or emotional) exist and the body is in perfect functioning.
The health of an individual is determined by several factors. These may be:
Internal factors: These are determined by a person's genetic composition, functioning of organ systems and tissues, education, personal hygiene, body's immune system, and other personal habits under an individual's control.
External factors: These include the factors that aren't under the control of an individual and are dependent on their surroundings, external environmental conditions, quality of air, water, soil, and availability of health facilities.