Just weeks after the Centers for Disease Control and Prevention began a comprehensive internal review with an eye toward restructuring, the agency’s director announced on Friday that the team that coordinated the national response to the Covid-19 pandemic would return some of its functions to other departments.

But the so-called Incident Management Structure, initially brought together to respond to the public health emergency, is not being dissolved and will continue to meet “the demands of this evolving pandemic,” according to a letter sent to employees on Friday by the agency’s director, Dr. Rochelle Walensky.

The move signals the beginning of efforts to put in place comprehensive changes at the agency, whose public standing and reputation have suffered in recent years. Some 60 percent of Americans, for example, say they are confused by changes in official pandemic recommendations, according to a recent Pew Research Center survey.

But Dr. Walensky’s letter was short on details regarding the changes.