Facebook Inc. on Wednesday took down a post by US President Donald J. Trump, which the company said violated its rules against sharing misinformation about the coronavirus.

The post contained a video clip, from an interview with Fox & Friends earlier in the day, in which Mr. Trump claimed that children are “almost immune” to COVID-19.

“This video includes false claims that a group of people is immune from COVID-19, which is a violation of our policies around harmful COVID misinformation,” a Facebook spokesman said.