Fauci has been threatened with murder several times after he clashed with Trump on several occasions during his previous time as president.
That he is now losing the protection paid for by federal authorities is commented on by Trump, according to NBC News, as "standard procedure".
They made a lot of money. They can pay for their own security, says the president, referring to Fauci and former Secretary of State Mike Pompeo and national security adviser John Bolton.
The latter two also lost their protection earlier in the week.
Fauci, among other things, helped coordinate the US response to the coronavirus pandemic and upset Trump by not supporting his unfounded claims about how the pandemic should be handled.
Fauci has received harsh criticism due to mask requirements and other policies that critics believed infringed on their rights. On Sunday, he was preemptively pardoned by President Joe Biden.
He then said that he appreciates the pardon, that he has not committed any crime and does not see any grounds for prosecution.
