Org. encouraging flu shots

CDC

This U.S. health agency tracks disease outbreaks and promotes annual vaccination campaigns.

This clue is a straightforward abbreviation for the Centers for Disease Control and Prevention, a U.S. government organization that promotes public health measures like flu vaccinations. "Org." is short for "organization," and "CDC" is the widely recognized acronym for the agency. The clue plays on the CDC’s role in encouraging flu shots as part of its disease prevention efforts.