Corona was always there. It was just a matter of time to get into right person. This was never new and will not be a surprise to see new ones in the future.https://www.cidrap.umn.edu/news-perspective/2003/09/animals-chinese-markets-carried-sars-virus
The researchers used nasal and fecal swabs from 25 animals of eight different species, including the civet, hog-badger, raccoon-dog, beaver, Chinese muntjac, domestic cat, Chinese hare, and Chinese ferret-badger. The animal coronavirus isolates were "99.8% homologous" to the human SARS coronavirus, but all the animal isolates had a 29-nucleotide sequence that is not found in most human SARS coronavirus isolates, according to the report.