evidence: They were told not to explore claims about gain-of-function experiments at the Wuhan lab to avoid attracting unwelcome attention to US government funding of such research, reports Vanity Fair. [...] During congressional testimony on 12 May, Dr Fauci emphatically denied the US had ever funded controversial gain of function research at the Wuhan lab. [...] Former President Donald Trump - widely vilified last year when he raised the possibility that Covid-19 came from the Wuhan lab - said on Thursday that Dr Fauci had a lot of questions to answer.