There are two different types of respiratory infection – upper and lower respiratory infection. Symptoms will vary from one person to the next based on where the infection is sitting in their respiratory system. Common symptoms of a respiratory infection can include: • Runny nose • Cough • Sore throat • Congestion, in either the lungs or the nasal sinuses • Body aches • Fatigue Symptoms such as difficulty breathing, dizziness, loss of consciousness, chills or a fever over 103 F (39 C) may require immediate medical attention. If you experience any of these symptoms, call your doctor immediately or go to an urgent care such as Physicians Now Urgent Care. Respiratory infections are caused by several different issues, and will differ again based on if it is an upper or lower respiratory infection. Upper respiratory infections are caused by a common cold, an acute ear infection or acute pharyngitis. Lower respiratory infections are caused by bronchiolitis, bronchitis or pneumonia.