The CDC was a government agency. Ben Landry was the director of CDC during Day 7 and Day 8.
Day 7[]
After Jack Bauer acquired a bio-weapon from Starkwood, he was exposed to the virus. Larry Moss sent a CDC team to quarantine Jack Bauer.
Day 8[]
When the threat of a possible radiological attack on New York City arose, President Allison Taylor held a videoconference with Ben Landry and other cabinet members. During the conference, Landry updated Taylor about the fatality and health risks of said attack.