First, health.
The World Health Organization (WHO) 1948 defines health in its charter as: "Health is not only the absence of disease or weakness, but also a good state of physical, mental and social adaptability." 1In September, 978, the Almaty Declaration issued by the International Conference on Primary Health Care reiterated: "Health is not only a hiding place for diseases and infirmities, but also a perfect state of physical and mental health and social happiness." 1990 when who discusses health in relevant literature, it puts forward that health includes four aspects: physical health, mental health, good social adaptation and moral health.
Second, sub-health.
Sub-health refers to a physiological state in which there is no definite disease in the body, but the physiological function and metabolic process of each system of the body are low, and the vitality and adaptability are reduced to varying degrees. It is also a state of low physiological function between health and disease, also known as "third state" or "gray state".
Third, the continuum view of health and disease.
The relationship between health and disease is a dynamic and continuous process and scope. If "normality" is regarded as health and "abnormality" is regarded as the criterion of disease, then health and disease may coexist in the same person. A person's body may have hidden pathological defects or dysfunction, but he is still "healthy" on the surface, and is usually considered sick only when there are symptoms or signs. In fact, once the clinical manifestations of some diseases appear, they are incurable, such as liver cancer and lung cancer.