Severe acute respiratory syndrome (SARS) is a contagious and sometimes fatal respiratory illness. SARS first appeared in China in November 2002. Within a few months, SARS spread worldwide, carried by unsuspecting travelers.
SARS showed how quickly infection can spread in a highly mobile and interconnected world. On the other hand, a collaborative international effort allowed health experts to quickly contain the spread of the disease. There has been no known transmission of SARS anywhere in the world since 2004.
SARS usually begins with flu-like signs and symptoms – fever, chills, muscle aches, headache and occasionally diarrhea. After about a week, signs and symptoms include:
Fever of 100.5 F (38 C) or higher
Shortness of breath
SARS is caused by a strain of coronavirus, the same family of viruses that causes the common cold. Previously, these viruses had never been particularly dangerous to humans.
Coronaviruses can, however, cause severe disease in animals, and that’s why scientists suspected that the SARS virus might have crossed from animals to humans. It now seems likely that the virus evolved from one or more animal viruses into a new strain.
In general, people at greatest risk of SARS are those who have had direct, close contact with someone who’s infected, such as family members and health care workers.
Many people with SARS develop pneumonia, and breathing problems can become so severe that a mechanical respirator is needed. SARS is fatal in some cases, often due to respiratory failure. Other possible complications include heart and liver failure.
People older than 60 – especially those with underlying conditions such as diabetes or hepatitis – are at the highest risk of serious complications.
Researchers are working on several types of vaccines for SARS, but none has been tested in humans. If SARS infections reappear, follow these safety guidelines if you’re caring for someone who may have a SARS infection:
Wash your hands. Clean your hands frequently with soap and hot water or use an alcohol-based hand rub containing at least 60% alcohol.
Wear disposable gloves. If you have contact with the person’s body fluids or feces, wear disposable gloves. Throw the gloves away immediately after use and wash your hands thoroughly.
Wear a surgical mask. When you’re in the same room as a person with SARS, cover your mouth and nose with a surgical mask. Wearing eyeglasses also may offer some protection.
Wash personal items. Use soap and hot water to wash the utensils, towels, bedding and clothing of someone with SARS.