The US denies the claims, even though Victoria Nuland says there ARE research facilities there:

Victoria Nuland testifying "Washington working to prevent bio research facilities in Ukraine from falling into Russian hands":

[link to www.youtube.com (secure)]

Newsweek article "U.S. Says Ukraine 'Diagnostic, Biodefense' Labs Have No 'Biological Weapons'"
[link to www.newsweek.com (secure)]

State.gov website "The Kremlin’s Allegations of Chemical and Biological Weapons Laboratories in Ukraine "

[link to www.state.gov (secure)]

Text from link:

https://imgur.com/a/7r1dcg4

[link to imgur.com (secure)]