According to Baidu Health, four chronic diseases include cardiovascular and cerebrovascular diseases, malignant tumors, chronic respiratory diseases, diabetes and metabolic diseases. Its cardiovascular diseases include hypertension, coronary heart disease and stroke. Chronic respiratory diseases include chronic obstructive emphysema, asthma, chronic pulmonary heart disease, chronic respiratory failure, silicosis and pulmonary fibrosis.
Chronic disease is a non-specific chronic non-infectious disease, which is characterized by hidden onset, long duration, easy recurrence, usually incurable and generally not contagious, but some diseases are hereditary, usually with multiple causes, and some causes are not completely clear.