Biden was asked about his message for platforms like Facebook as he departed the White House on Friday afternoon for a weekend trip to Camp David.
"They're killing people. The only pandemic we have is among the unvaccinated. And they're killing people," Biden said.
At her daily press briefing, Psaki told reporters that the White House is "regularly" coordinating with Facebook and other social media giants on the "latest narratives dangerous to public health" that the administration thinks should be censored.
"We are regularly making sure social media platforms are aware of the latest narratives dangerous to public health that we and many other Americans are seeing across all of social and traditional media," Psaki said.
"There's about 12 people who are producing 65 percent of anti-vaccine misinformation on social media platforms," she said.