I would not put chemical warfare or bioweapons past Putin. In fact, it's perfectly in line with his previous usage of nerve agents to assassinate his political opponents. However, I recall the U.S. vehemently denying funding gain of function research in Wuhan where it turns out they actually did fund experiments with bat coronaviruses. So likewise, I would not put it past the U.S. to have been funding whatever twisted experiments in Ukraine just as they were doing in China. I have yet to see any evidence of this, of course, but it's not a wild theory. It took something like a year before the NIH admitted what was going on in Wuhan.
Here's another talking point for you courtesy of Kremlin: US bioweapon labs in Ukraine were developing strains of bird flu to spread to Russia via migrating birds. It must be true because something something China.
Take that, chemtrail nutjobs. BIRDS!
An the immediate question arises: If you plan to use birds to spread the flu - technically called a "vector" - how is that exactly going to pass onto the humans?
Or maybe
Perhaps he had the idea when...
That last image is not real by the way, however who would be stupid enough to liberate a virus that would eventually hit you back??