The United States has been accused of aiding the Ukrainians to manufacture biological weapons using bats, birds and fleas to spread deadly infections.
Russia's UN ambassador, Vasily Nebenzya, made the allegations amidst a humanitarian crisis in Ukraine caused by the invasion with thousands killed and cities cut off from water and energy supplies.
Ukraine President Volodymyr Zelensky has also said he is worried that Russia could in fact be planning a biological attack, claiming it is a common strategy for it to make accusations of others before carrying it out themselves.
