Russian disinformation often begins with a speck of fact, which is then twisted into a full-blown conspiracy theory. The technique makes it easier to spread and take root among the country’s supporters. Note how quickly the party line uttered by the Russian Foreign Ministry was embraced by Carlson.
In this instance, Russia for years has been seeding the ground to claim that the United States set up biowarfare labs in Ukraine and other former Soviet republics. Then, brief remarks by Victoria Nuland, the undersecretary of state for political affairs, were twisted to provide “confirmation” of the disinformation program.
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Source: ’U.S. bioweapons labs in Ukraine’ claim is Russian disinformation | The Washington Post