Most people confirmed to have MERS-CoV infection have had severe acute respiratory illness with symptoms of:
• fever
• cough
• shortness of breath
For many people with MERS, more severe complications followed, such as pneumonia and kidney failure. About 3-4 out of every 10 people reported with MERS have died. Most of the people who died had an underlying medical condition. Some infected people had mild symptoms (such as cold-like symptoms) or no symptoms at all; they recovered.