1. Definition and symptoms of bronchopneumonia in babies Bronchopneumonia refers to infectious diseases caused in the bronchial mucosa and alveoli. After babies contract bronchopneumonia, they often develop cold-like symptoms such as cough, fever, sore throat, etc. In addition, respiratory-related symptoms such as chest tightness, shortness of breath, and fatigue may also occur. 2. Causes of bronchopneumonia in babies Bronchopneumonia is caused by a variety of bacteria or viruses. Normally, these bacteria or viruses enter the human body through the air and then spread in the respiratory tract