Health is defined by the World Health Organization as a state of complete physical, mental and social safety, and not merely the absence of disease or disability, as health also means the ability to recover and cure disease and other health problems that may affect A person has a lifetime, and good health includes a host of factors, including: Genetic, environmental, social, and educational health care has existed in order to help people maintain an optimal state of health, and it should be noted that researchers have recently defined health as the body's ability to adapt to new threats and diseases, and they base this on that Modern science has greatly increased human awareness of diseases and how they work in the past years.