Some coronaviruses are known to spread from animal to animal and have not yet infected humans.
Coronaviruses that infect humans are basically derived from animals. At present, it is believed that SARS-CoV is transmitted from civet to humans and MERS-CoV is transmitted from dromedaries to humans.
Coronavirus that has endangered humans 3 times this century, it’s not what you think!
But as of now, the new coronavirus has not found a clear chain of transmission.
Where did the coronavirus come from?
The animal itself was the original host, and the source of the virus existed in nature.