Health officials around the world are grappling with a rapidly spreading epidemic of a severe respiratory ailment known as SARS. Here's a quick look at who's at risk and other basic questions about the disease. Q. What is SARS? A. SARS stands for severe acute respiratory syndrome. It's a new disease that doctors still don't know much about. Q. What are the symptoms of SARS? A. They are a lot like pneumonia or the flu. People get a very high fever -- at least 100.4 degrees. They also usually have shortness of breath or other problems breathing and a dry...