What are the symptoms of pneumonia in a three-month-old baby

Pneumonia in infants aged three months is mainly caused by bacterial infection of the lungs. It can be manifested as cough, poor breathing, expectoration, chest distress, fever, loss of appetite, poor spirit, lethargy and other symptoms. This disease requires timely use of anti-inflammatory, antitussive and expectorant drugs and aerosol inhalation treatment.