https://www.bbc.com/news/57932699Did the US fund virus research in China?
Yes, it did contribute some funds.
Dr Fauci, as well as being an adviser to President Biden, is the director of the US National Institute of Allergy and Infectious Diseases (NIAID), part of the US government's National Institutes of Health (NIH).
Reuters Wuhan Institute of VirologyReuters
Lab-leak theories centre on the Wuhan Institute of Virology
This body did give money to an organisation that collaborated with the Wuhan Institute of Virology.
That organisation - the US-based EcoHealth Alliance - was awarded a grant in 2014 to look into possible coronaviruses from bats.
EcoHealth received $3.7m from the NIH, $600,000 of which was given to the Wuhan Institute of Virology.
In 2019, its project was renewed for another five years, but then pulled by the Trump administration in April 2020 following the outbreak of the coronavirus pandemic.
Was US money used for 'gain-of-function' studies?
In May, Dr Fauci stated that the National Institutes of Health (NIH)
"has not ever and does not now fund gain-of-function research in the Wuhan Institute of Virology".
Senator Rand Paul asked Dr Fauci if he wanted to retract that statement, saying:
"As you are aware it is a crime to lie to Congress."