I can't find the article/post now ... I recall it was written just as initial international investigation happened and released statement that "It's highly unlikely Covid-19 originated from Wuhan research center".
Guy mentioned things like lab technician carrying box with vials (with faded labels made using type writer) from one building to another and some of vials breaking (luckily not the one containing smallpox).
And there was also something about specific room/lab (I think in CDC) in new/rebuilt building where door didn't quite have a good seal - being fixed by duct tape.
And we'll the gist of it is - there's a long history even within USA/CDC to downplay/hide such accidents.