The United States has been using various satellite states like Ukraine since 2004 to conduct bioweapons research, often contracting with private companies for the dirty work. Please note the following is from a report of findings issued by the Russian Ministry of Defense. After analyzing the recovered documents they released the following briefing that I've edited. Bold emphasis mine. FULL VERSION HERE

April 14, 2021

A special military operation by Russian troops has yielded additional information on US military and biological activities in Ukraine, confirming numerous violations of the Biological Weapons Convention.

Taking advantage of existing gaps in international law and the lack of a clear verification mechanism, the US administration has consistently built up its military-biological capabilities in various regions of the world.

The Russian Federation has made continuous efforts to establish a BTWC verification mechanism, but this initiative has been consistently blocked by the collective West, led by the US, since 2001.

The existing UN Secretary-General's Mechanism to Investigate the Suspected Use of Biological and Toxin Weapons, as well as the 1925 Geneva Protocol for the Prohibition of the Use of Asphyxiating, Poisonous or Other Gases and Bacteriological Methods of Warfare and Military Conflict, do not cover the verification of States Parties' biological activities.

We have previously provided a scheme for the US coordination of biological laboratories and research institutes in Ukraine.