Coronaviruses can make humans and animals sick. Some coronaviruses can cause illness similar to the common cold and others can cause more serious diseases, including Severe Acute Respiratory Syndrome (SARS) and Middle East Respiratory Syndrome (MERS). The virus seen in mainland China has not been detected before this outbreak. Most people infected live in, or travelled to, mainland China. There have been cases of (COVID-2019) reported in other countries. It is likely that the virus originally came from an animal, and there is now evidence that it can spread from person-to-person.