accidentally on purpose
The coverup was definitely on purpose.
Or maybe whoopsie that on reflection led the authorities (authoritarians) that slight population hit and sharing with the world (western Europe, north America specifically) had more benefits than drawbacks.
Another possibility is Iran, working closely with China labs, snuck some out for jihad but spilled some on themselves, then same conclusions as above.
Either way, The Joker Smiles, The Devil Dances.
The timing gives it away.
yes
Yes!