Genomic characterisation and epidemiology of 2019 novel coronavirus: implications for virus origins and receptor binding.
What follows is an excerpt from a new scientific research paper published at PubMed.gov and maintained by the National Center for Biotechnology Information, U.S. National Library of Medicine
“As a typical RNA virus, the average evolutionary rate for coronaviruses is roughly 10– ⁴ nucleotide substitutions per site per year,1 with mutations arising during every replication cycle. It is, therefore, striking that the sequences of 2019-nCoV from different patients described here were almost identical, with greater than 99·9% sequence identity. This finding suggests that 2019-nCoV originated from one source within a very short period and was detected relatively rapidly. However, as the virus transmits to more individuals, constant surveillance of mutations arising is needed.”
Found in the full text of this paper https://www.ncbi.nlm.nih.gov/pubmed/32007145