Good grief. The contention here is that in 1977 the Russians were culturing samples of an existing strain of H1N1 that was known to researchers from an outbreak 26 years previous, but which had dropped out of circulation. And they oopsed, and it got out. That seems not totally improbable, and I'll believe the sequencing results.

I don't know how you get from there to (sigh) "Covid is human-engineered", at all. Can you explain how this is relevant at all, except in the way both hypotheses invoke evil foreign laboratories in totalitarian states?