Why are children with prediabetes prone to respiratory infections?

　　 The respiratory muscles are extremely intolerant of fatigue.　　The above characteristics cause obstruction, sputum obstruction, pulmonary atelectasis and pulmonary solids in the pediatric respiratory system. In children with precordial disease, especially in left-to-right shunt type and pulmonary polycythemia vera, the blood flow and interstitial water in the lungs are increased, the pulmonary compliance is reduced, the respiratory effort is reduced, the bronchial submucosa and peribronchial arterioles are congested and stagnant, the airway is narrowed, the ventilation resistance is increased and blocked by secretions; in addition, children with precordial disease are often thin and have low resistance, so respiratory infections are easy to occur and the condition is easy to be serious.