Coronaviruses are a family of viruses that cause illnesses ranging from the common cold to more severe diseases. Middle East respiratory syndrome (MERS) is a viral respiratory disease caused by a coronavirus called MERS-CoV. The first case was reported in Saudi Arabia in 2012. Additional cases were found in several Middle Eastern countries. Research indicates that camels are a reservoir for the virus and may transmit it to humans. Transmission between humans occurs through close contact. Symptoms include severe pneumonia and kidney failure. There is no vaccine or specific treatment, though supportive care can be given.