Before 5 August 2022, will a NATO member state accuse Russia of using a chemical or biological weapon in Ukraine?
The US has alleged that Russia is considering the use of chemical and biological weapons in Ukraine (France 24). As of launch, there were 30 NATO member states (NATO). The use of chemical or biological agents confined to an individual or small group of individuals in noncombat situations would not count (e.g., Sergei and Yulia Skripal, Alexander Litvinenko, Viktor Yushchenko, Roman Abramovich (Daily Mail, BBC). Ukraine includes the boundaries generally recognized by the international community, including Donbas and Crimea. Accusations about incidents prior to Russia's invasion of Ukraine would be immaterial.
NOTE 12 April 2022: An accusation of the use of white phosphorus alone would not be considered an accusation that chemical or biological weapons were used.
The question closed "No" with a closing date of 5 August 2022.