Update and Interim Guidance on Outbreak of 2019 Novel Coronavirus (2019-nCoV) in Wuhan, China Coronaviruses are a large family of viruses that can cause respiratory illnesses such according to the Centers for Disease Control and Prevention (CDC) . Most people get infected with coronaviruses at one point in their lives, but symptoms are typically mild to moderate. In some cases, the viruses can cause lower-respiratory tract illnesses such as pneumonia and bronchitis. People wear face masks as they wait at Hankou Railway Station on Jan. 22, 2020, in Wuhan, China, where the new coronavirus 2019-nCoV originated. (Image: © Xiaolu Chu/Getty Images as the common cold, These viruses are common amongst animals worldwide, but only a handful of them are known to affect humans. Rarely, coronaviruses can evolve and spread from animals to humans. This is what happened with the coronaviruses known as the Middle East respiratory syndrome coronavirus (MERS-CoV) and the severe acu...