Mistakes? GTFO. Look, stuff happens. If ever single event were regarded as an existential threat, we’d all be cowering under our beds, from now until we die.
A new virus, one that the Chinese have responsibility for, either through odd dietary habits, or an accident in their lab. But, who could have known how infectious this thing would be? You have to be pragmatic, and evaluate things as information becomes available. I think the Trump administration has done a good job, not flawless, but then, who is flawless?
There's a lot of technical reasons this looks like a bioweapon.