Covid was released by China as a economic and political weapon. It was designed to be lethal to elderly and compromised people and not affect young and military aged persons and as such it has been enormously successful against the West. I'm sure that the Chinese have a much more lethal variety along the lines of the Spanish flu stockpiled and an antidote as well ready to deploy as a bio-weapon.
I have no doubt that Covid came from a Chinese laboratory, but I have difficulty believing it’s release was intentional. Why start a biological attack in your own country? Granted that the Chinese may have no more regard for their citizens than if the were just so many chickens, but why not release it closer to your intended targets? Why not seed the virus directly and covertly in the populations you wish to infect? Why start it in your own country which makes its source abundently clear? Why not add confusion and recrimation between infected allied enemies into the mix?