The Hollywood actor was playing Dr Anthony Fauci, the US director of the National Institute of Allergy and Infectious Diseases.
Brad Pitt has played a US health expert in a sketch on Saturday Night Live.
The Hollywood actor took several swipes at President Donald Trump during the segment on the programme, in which he impersonated Dr Anthony Fauci, the US director of the National Institute of Allergy and Infectious Diseases.
In the sketch, Pitt joked about Mr Trump's claim that a vaccine could arrive "relatively soon".
And now, a message from Dr. Anthony Fauci. #SNLAtHome pic.twitter.com/LYemNAWaAT
— Saturday Night Live – SNL (@nbcsnl) April 26, 2020
He said: "Relatively soon is an interesting phrase.
"Relative to the entire history of earth, sure, the vaccine's going to come real fast.
"But if you were to tell a friend I will be over relatively soon and then showed up a year and a half later, well your friend may be relatively p***** off."
Speaking after a clip was played in which Mr Trump said the virus may disappear "like a miracle", Pitt said: "Miracles are great, who doesn't love miracles?
"But miracles shouldn't be plan A."
With the release of their third album 'Typhoon' growing steadily nearer, Royal Blood have unveiled yet another single entitled 'Boilermaker'...
Olly Alexander shows off his journey of self-love in the video for Years & Years' newest single 'Starstruck'; the lead track from his forthcoming...
Shirley Manson is well known for her vocal political views, and she takes no prisoners with Garbage's latest single 'The Men Who Rule The World'.