Ukraine bioweapons conspiracy theory

In March 2022, during the Russian invasion of Ukraine, Russian officials falsely claimed that public health facilities in Ukraine were "secret U.S.-funded biolabs" purportedly developing biological weapons, which was debunked by multiple media outlets, scientific groups, and international bodies. The claim was amplified by China's Ministry of Foreign Affairs and Chinese state media, and was also promoted by followers of the QAnon conspiracy theory and subsequently supported by other far-right groups in the United States.

Source: Wikipedia — Ukraine bioweapons conspiracy theory (CC BY-SA 4.0)