Asymptomatic |
Positive PCR test without clinical manifestations or radiologic findings. |
Mild |
Low- or high-grade fever, fatigue, myalgia, sore throat, headache, sneezing, dry cough, runny nose, nasal congestion, and gastrointestinal symptoms such as nausea, vomiting, abdominal pain, diarrhea, and non-severe pneumoniae on chest imaging. |
Moderate |
Lower respiratory tract infection symptoms, fever, dry or productive cough, wheezing, and positive findings on chest imaging. |
Severe |
Rapid progression of the disease with dyspnea, central cyanosis, increased respiratory rate above 70/min for infants and above 50/min for children greater above the age of 1 year, coma, convulsions, somnolence, severe dehydration, and oxygen saturation below 92%. |
Critically ill |
Rapidly progressing to acute respiratory symptoms, respiratory failure and end organ damage such as heart failure, shock, acute kidney injury, liver injury, encephalopathy, coagulopathy, or myocardial damage. |