How does the mind influence health according to biology?

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. In later years, biologystated that mind influences, through neural system and endocrine system, our immune system and that our immune system maintains our health. Hence, mind and mental state can affect our health