'SARS-CoV-2, hereafter referred to as SARSr-CoV-WIV, is a synthetic spike protein chimera engineered to attach to human ACE2 receptors and inserted into a recombinant bat SARSr-CoV backbone."
"…deliberately virulent, humanized.."
https://media.128ducks.com/file_store/23972b92690d7c54bfb8ea3078c34cc2a8bc227694bcdd30e4bee1194c69ca44.pdf