What is the definition of health?

:Early Greeks and Indian Ayurveda system of medicine believed that a person's health was determined by the balance of certain "humors" in the body, and that persons with "black bile" belonged to hot personality and would have fevers. William Harvey disproved the "good humor" hypothesis of health by discovering the blood circulation and demonstrating normal body temperature in persons with black bile using a thermometer. According to biology, the mind influences health through the neural and endocrine systems, which in turn affects the immune system and maintains health. Health is defined as a state of complete physical, mental and social well-being, not just absence of disease or physical fitness.Good health can be maintained through a balanced diet, personal hygiene, regular exercise, awareness about diseases, proper disposal of waste, control of vectors, and hygienic food and water resources.