The U.S. admission followed a June 14 Reuters investigation that revealed how the Pentagon launched a secret psychological operation to discredit Chinese vaccines and other COVID aid in 2020 and 2021, at the height of the pandemic. As a result of the Reuters investigation, the Philippine Senate Foreign Relations Committee launched a hearing into the matter and sought a response from the U.S.
According to the June 25 document, Pentagon officials concluded its anti-vax campaign was “misaligned with our priorities.” It says the U.S. military told Filipino officials that operatives “ceased COVID-related messaging related to COVID-19 origins and COVID-19 vaccines in August 2021.”
... so Trump?
I imagine Biden had a lot of fires to put out once he became President in January 2021, but it would have been nice if this scheme ended sooner.