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Upper respiratory infections are one of the most common reasons for doctor visits.

Acute respiratory infection can interfere with normal breathing. It usually begins as a viral infection in the nose, trachea (windpipe), or lungs. They are contagious caused by bacteria and viruses such as influenza A and B, strep, rhinoviruses, RSV, Respiratory Syncytial Virus, whooping cough, etc… If the infection isn’t treated, it can spread to the entire respiratory system.

What Are the Symptoms of Acute Respiratory Infection?

The early symptoms of acute respiratory infection usually appear in the nose and upper lungs. These symptoms include:
  • congestion, either in the nasal sinuses or lungs
  • runny nose
  • cough
  • sore throat
  • body aches
  • fatigue

If the disease advances, there may be high fever and chills. Other serious symptoms are:

  • difficulty breathing
  • dizziness
  • low blood oxygen level
  • loss of consciousness