The specific codon sequence (CGG) for arginine at the furin cleavage site, found in approximately 5% of coronaviruses, may be a marker of genetic editing.

“what i think also got a lot of attention in nick wade's piece was the i think it's a cgg arginine and that is a very unusual arginine it's only typically present in five percent of chronoviruses meaning only five percent of the time when a when a coronavirus needs to make an arginine does it use a i think it's ccg or cgg okay but when you go and look more deeply in the literature it turns out that you saw that in other furan cleavage sites of other coronaviruses that also had very little of that in other words there was another criminal virus that i saw that only had three percent of its arginines being either ccg or cgg but it still showed up in its fear and cleavage site and there's no ambiguity about whether that was naturally occurring or not”