Wikiedia says cdc is a federal agency. Wikapedia is not a good scource but we need ammunition to counter these people.
The CDC foundation is not.
CDC has a .gov email.
CDC is one of the major operating components of the Department of Health and Human Services. View CDC’s Official Mission Statements/Organizational Charts to learn more about CDC′s organizational structure.
https://www.cdc.gov/about/organization/orgchart.htm
Organizational Chart at link.