The outcome of prolonged pediatric pneumonia depends on two main aspects: 1) the virulence of the causative organism; 2) the baby’s resistance. If the virulence of the causative agent is not strong and the baby’s resistance is strong, most pneumonia can get better on its own, even without treatment. If the baby’s resistance is weak and the virulence of the pathogenic bacteria is strong, such as influenza virus, adenovirus, Staphylococcus aureus and fungal pathogens causing lung infections, if the condition is delayed and not treated in time, various lung complications may occur, including pleural effusion, pneumothorax, pulmonary blisters, atelectasis, bronchiectasis, etc. In severe cases leading to severe pneumonia, serious complications such as respiratory failure, heart failure, toxic encephalopathy, toxic intestinal paralysis, and even multiple organ failure can occur. Therefore, it is important to treat pediatric pneumonia promptly once it occurs and not to delay the condition to avoid various complications and sequelae that can affect the quality of life.