Bird Flu is Scam ..Don't Buy It, page-91

"Proven Wrong" says the internet forum man. If it is OK with you, I will continue to believe what every reputable medical/scientific organization says. Please don't post your "proof" in the form of more cooky links.

Abstract

The spike protein is a focused target of COVID-19, a pandemic caused by SARS-CoV-2. A 12-nt insertion at S1/S2 in the spike coding sequence yields a furin cleavage site, which raised controversy views on origin of the virus. Here we analyzed the phylogenetic relationships of coronavirus spike proteins and mapped furin recognition motif on the tree. Furin cleavage sites occurred independently for multiple times in the evolution of the coronavirus family, supporting the natural occurring hypothesis of SARS-CoV-2.

https://www.sciencedirect.com/science/article/pii/S1873506120304165
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7836551/