CDC Blocks Bird Flu Data as H5N1 Spreads to 70 Americans

The Centers for Disease Control and Prevention stopped publicly releasing detailed H5N1 bird flu surveillance data in June 2025 as the virus had infected at least 70 Americans, raising concerns about a potential pandemic. Public health officials said the data suppression made it impossible to track exposure sources and transmission patterns. The CDC under RFK Jr. direction cited ongoing data quality reviews as the reason for the reporting pause.