For February 2020 email exchange wit one former USA health secretary, Dr Fauci said: "Masks really na for infected pipo to prevent them from spreading infection to pipo wey no dey infected rather than protecting uninfected pipo from getting di infection".
COVID-19's origins have become one of the most contentious questions of the pandemic.
The controversial claim was dismissed by experts previous year, who said it was "extremely unlikely".
Paul claimed the nation's top infectious disease expert had an "incestuous" relationship' with Dr. Peter Daszak, a British zoologist whose EcoHealth Alliance non-profit steered US funding toward the Wuhan lab, and the scientists working there.
Three employees at the Wuhan Institute of Virology, which was conducting research into coronaviruses, were treated in hospital for their symptoms more than a month before China informed the World Health Organisation (WHO) of the spread of a new disease.
'From my perspective, your comments are fearless, and coming from your trusted voice, will help dispel the myths being spun around the virus's origins, ' he wrote to Fauci in April 2020.
This May, Dr Fauci said he is "not convinced" the virus originated naturally and expressed support for an investigation.
On Wednesday, a book by Dr. Anthony Fauci, "Expect the Unexpected: Ten Lessons on Truth, Service, and the Way Forward" appeared to have been entirely scrubbed from Amazon after being listed for pre-order, as well as from the Barnes & Noble bookstore.
Citing Depression, Naomi Osaka Withdraws from Roland Garros
We wish her the best and quickest possible recovery, and we look forward to having Naomi at our Tournament next year". It takes seven victories to win a Grand Slam title, which she has done four times at hard-court tournaments: the U.S.
"I have always felt that the overwhelming likelihood, given the experience we have had with Sars, Mers, Ebola, HIV, bird flu, the swine flu pandemic of 2009, was that the virus jumped species", he said.
He added that store-bought masks are "not really effective in keeping out virus, which is small enough to pass through material".
Dr Fauci resply: "I understand".
As the public sought answers to the worsening crisis, Dr Fauci fielded inquiries from across the United States - including Hollywood and Silicon Valley.
Actress Morgan Fairchild - who reportedly collaborated with him during the Aids epidemic of the 1980s - reached out in February asking how she could help.
'Where someone can snip out a sentene in an email without showing the other emails and say, "based on an email from Dr. Fauci, he said such-and-such", where you don't really have the full context, ' the doctor said.
Some conservative politicians and media analyst don cite di emails as dem dey call for di sack of Dr Fauci for im work on di pandemic response.
Dr. Anthony Fauci at a Senate hearing in May.