An Introduction to SARS Symptoms
Severe acute respiratory syndrome (
SARS) is a new viral respiratory illness first identified in humans in early 2003. The SARS virus spreads primarily by close human contact, either through the air or by touching a contaminated surface.
The time between exposure to the SARS virus and the onset of SARS symptoms is called the incubation period. The incubation period for SARS is typically two to seven days, although in some cases, it may be as long as 10 days.
SARS symptoms usually begin with a high fever, marked by a temperature greater than 100.4°F (38.0°C). Other early SARS symptoms may include:
- Headache
- An overall feeling of discomfort
- Body aches
- Chills.
In some patients, body aches and
headaches may appear 12 to 24 hours before fever.
Some people also have mild respiratory symptoms (sore throat or runny nose) at the outset. About 10 to 20 percent of patients with SARS symptoms have
diarrhea.
After two to seven days, SARS patients may develop a dry cough and shortness of breath. These SARS symptoms may be accompanied by or progress to a condition in which the oxygen levels in the blood are low (hypoxia). In 10 to 20 percent of cases, patients require mechanical ventilation.
Most patients develop pneumonia.