What is the health status of preschool children?

The health status of preschool children is worrying. Sub-health problems, such as repeated respiratory infections, cough, asthma, anorexia or food accumulation, are all related to parents' health literacy. Many parents (especially the elderly) spoil their children too much, which leads to their partial eclipse. The lack of fruit and vegetable intake and trace elements in the diet structure will lead to poor immune function, and some diseases will take advantage of it.