Mr. Trump also wrote that the United States would reconsider its membership in the W.H.O. because it was “so clearly not serving America’s interests.”

“It is clear the repeated missteps by you and your organization in responding to the pandemic have been extremely costly for the world,” the president wrote in a four-page letter outlining his grievances against the organization and its leader, Dr. Tedros Adhanom Ghebreyesus…

“We must be frank about one of the primary reasons that this outbreak spun out of control,” Mr. Azar said in a prepared video to the World Health Assembly, the global health agency’s annual meeting. “There was a failure by this organization to obtain the information that the world needed, and that failure cost many lives.”