Initial symptoms of severe acute respiratory syndrome (SARS) include:

• Body aches
• Dry cough
• Fever over 100.4 (38.0 C)
• Headache
• Runny nose
• Sore throat
• Weakness or fatigue
• Anorexia
• Diarrhea

After 2-4 days, symptoms of severe acute respiratory syndrome (SARS) include:

• Worsening cough
• Chest congestion
• Wheezing
• Difficulty breathing

Symptoms of worsening severe acute respiratory syndrome (SARS) include:

• Signs of severe difficulty breathing:
• Rib retractions: ribs are visible during each breath
• Nasal flaring: nostrils open wide during each breath
• Use of accessory muscles: neck muscles are prominent during each breath
• Constant wheezing
• Cyanosis:
• Blue lips or nailbeds