In late October, after eight months of war, the Russian government claimed that Ukraine was preparing to use a "dirty bomb" and blame it on Russia. There was never any evidence for this claim. But Russia's ambassador to the UN, Vassily Nbenzia, nevertheless sent a letter (reproduced below) demanding that the Security Council hold a meeting to discuss the "dirty bomb" issue.

China, ostensibly neutral on Vladimir Putin's invasion of Ukraine, took a significant step into Moscow's camp on Tuesday when a government official repeated a Russian conspiracy theory about the existence of U.S.-funded biological weapons in the country.

At a regular press briefing in Beijing, Zhao Lijian, a spokesperson for China's Foreign Ministry, read out a Russian media report about the alleged discovery of a "military biological program" in Ukraine in the days after the large-scale offensive began.

After accusing the U.S. of producing bioweapons in Ukraine, the Russian Ministry of Defense has added another feather-ruffling theory to their accusation: That the U.S. is training birds in Ukraine to spread deadly diseases among Russian citizens.

The claim is just one of many false claims that Russia has offered to justify its ongoing invasion of Ukraine, including the baseless allegation that Ukrainian officials were committing genocide against ethnic Russians.

Since invading Ukraine in February, the Russian government has tirelessly worked to convince others of the existence of an illicit US-Ukrainian bioweapons program. It’s brought the claims to the UN Security Council, the Biological Weapons Convention, and other international venues, sometimes more than once. Earlier this month, Moscow went to the Security Council for the fourth time this year. This time, Russian diplomats triggered a never-before invoked mechanism to vote on creating a commission to investigate its bioweapons allegations. Once again, few countries sided with Russia.

Syria’s Chemical Weapons Declaration Cannot Be Considered Accurate, Complete, Disarmament Affairs Chief Tells Security Council

Russian and separatist media claim that Ukrainian military have used white phosphorus munitions, weapons that are banned under the Geneva Convention. However, the mine fragments they have shown as evidence are of a different type of munition.

On February 19 the Donetsk television station Union reported in its newscast that near the city of Horlivka, some 56 kilometres north of the eastern Ukrainian city Donetsk, the center of the self-proclaimed Donetsk People’s Republic (DPR,  the Ukrainian side had fired white phosphorus bombs on the Russian supported militants.

Myth 3: “Ukraine will use chemical, nuclear and other prohibited weapons against civilians in Donbas."

The United Nations is not aware of any biological weapons programmes in Ukraine, a senior official in the Office for Disarmament Affairs (UNODA) reiterated in a briefing to the Security Council. 

ABSTRACT: While biological warfare has classically been considered a threat requiring the presence of a distinct biological agent, we argue that in light of the rise of state-sponsored online disinformation campaigns, we are approaching a fifth phase of biowarfare with a ‘‘cyber-bio’’ framing.

“We’re not just fighting an epidemic; we’re fighting an infodemic,” said World Health Organization (WHO) Director-General Tedros Adhanom Ghebreyesus at the Munich Security Conference on February 15, 2020.