It is a state of physical, mental and social well-being.
When people are healthy, they are more efficient at work. This increases productivity and brings economic prosperity.
Health also increases longevity of people and reduces infant and maternal mortality.
Balanced diet, personal hygiene and regular exercise are very important to maintain good health. Yoga has been practiced since time immemorial to achieve physical and mental health.
Disease:
Disease is a disorder or malfunction of the mind or body, which leads to a departure from good heal.
Disease is diagnosed by a doctor after analyzing the symptoms (physical and mental signs).
Diseases are said to be infectious or communicable if pathogens can be passed from one person to another.