Concept:Health is defined as a state of complete physical, mental and social well-being.Since health is wealth, effective health maintenance benefits both the body and the mind, as well as the future.When people are healthy, they are more efficient at work.This increases productivity and brings economic prosperity.Explanation:Factors necessary for a healthy person are:Balanced diet,Personal hygiene and regular exercise,Awareness about diseases and their effect on different bodily functions,Vaccination (immunisation) against infectious diseases,Proper disposal of wastes,Control of vectors and maintenance of hygiene in food and water resources.Important PointsVaccination:Vaccines are critical to the prevention and control of infectious disease outbreaks.They help reduce global health security and are a vital tool in the battle against antimicrobial resistance.Balanced diet:A balanced diet gives your body the nutrients it needs to function correctly. A person may be getting enough food to eat, but sometimes the food may not contain a particular nutrient.If this continues over a long period of time, the person may suffer from its deficiency.The deficiency of different vitamins and minerals may also result in certain diseases or disorders.All deficiency diseases can be prevented by taking a balanced diet.Some diseases/disorders are caused by a deficiency of vitamins and minerals.?Personal hygiene:Good hygiene is important for cleanliness.Good hygiene prevents illness.Good hygiene practices are:Brushing teeth daily.Bathing daily.Washing hair regularly.Wearing clean and tidy clothes daily.Keeping rooms clean.Flushing toilets with water after use.Getting nails cut when they grow big.Washing hands before and after eating food.Washing hands with soap after going to the toilet.Thus, vaccination, a balanced diet, personal hygiene all are the factors necessary for a healthy person.