The UNSC meeting is interesting. The Russian allegations are quite mild and could plausibly be true. Americans have been researching pathogens that could have military application, and pose a health risk to the local Ukrainian people. They're not claiming America unleashed COVID-19 on the world like the Americans are accusing China of.
The pro-US countries are calling it disinformation as expected. The one African country so far (Ghana) has said these claims need to be investigated by the relevant authorities, but Russian forces need to withdraw first. I expect the other African countries will say something similar. The Indian delegate didn't seem to listen to anything the Russian said and made a vague ambivalent statement about the war, nothing to do with biological weapons. At least he didn't bring up Indian students again.
It'll be interesting to hear what the Chinese delegate says.
Overall, it's not news to me that America would be researching pathogens for military application. Both Russia and America are doing it. 90% of this will be for defensive purposes (like developing vaccines), but both countries would be interested in offensive capacity, if only to see what the "other side" can do.
I find it strange that America would set up these research facilities in countries as far away as the Ukraine, but I guess that's because of their overuse of private contractors.
Whatever is going on in them, the American government will not want their biolabs to be investigated by the UN under any circumstances, so if Russia or politicians in America keep pushing them on this it'll continue to cast them in a bad light.