The currently available evidence supports a lab-related origin of the novel coronavirus. The phylogenetic evidence links SARS-CoV-2 to a 2012 covid-like pneumonia incident in a Chinese mine near Mojiang. The virus samples of this incident were collected, stored and investigated by the Wuhan Institute of Virology (WIV). However, some US labs may also have had access to this data, as they were collaborating with the Wuhan lab in the field of coronavirus research. At the genetic level, the existence of a furin cleavage site involving a CGG-coded double arginine codon and a BsaXI Golden Gate seamless cloning site may indicate genetic engineering. In contrast, the search for an intermediate animal host has so far remained unsuccessful.

https://swprs.org/on-the-origin-of-sars-coronavirus-2/