Severe acute respiratory syndrome (Sars) and Middle Eastern respiratory syndrome (Mers) are both caused by coronaviruses that came from animals. In 2002, Sars spread virtually unchecked to 37 countries, causing global panic, infecting more than 8,000 people and killing more than 750.
Mers appears to be less easily passed from human to human, but has greater lethality, killing 35% of about 2,500 people who have been infected.
All you need to know on Coronavirus
Where do Coronaviruses come from?
What is COVID-19? What is SARS-CoV-2?
Is this coronavirus comparable to SARS or to the seasonal flu (influenza)?
What is the mode of transmission?
How (easily) does Coronavirus spread?
Can someone spread the coronavirus without being sick?
Are some people at more coronavirus risk than others?
Is there a treatment for the COVID-19 disease?
When should I be tested for COVID-19?
How does the Coronavirus spread?
Have there been other coronaviruses?