The primary cause of pediatric pneumonia is the spread of upper respiratory infections (such as colds, tonsillitis, bronchitis, or tracheobronchitis) to the lungs. Important preventive measures include strengthening the immune system, preventing rickets and malnutrition, and avoiding contact with children who have acute respiratory infections to prevent cross-infection. Additionally, it is recommended to keep babies away from playing with sick children and adults should avoid visiting homes of sick children.