The severe acute respiratory syndrome (SARS) that broke out in Guangdong in February 2003 and the Middle East respiratory syndrome (MERS) that broke out in Saudi Arabia in September 2012 were caused by SARS-CoV and MERS-CoV coronaviruses, respectively.

Some people suffer from sleep disorders, what causes them? What are the risks? How can they be confronted? Dr. Ulrich Fodderholzer says sleep disorders mean an inability to enjoy a restful and comfortable sleep at least three nights a week for more than four weeks.