Nearly half of the databases that public health officials at the Centers for Disease Control and Prevention were updating on a monthly basis have been frozen without notice or explanation, according to a study published in the Annals of Internal Medicine.
The study—led by Janet Freilich, a law expert at Boston University, and Jeremy Jacobs, a medical professor at Vanderbilt University—examined the status of all CDC databases, finding a total of 82 that had, as of early 2025, been receiving updates at least monthly. But, of those 82, only 44 were still being regularly updated as of October 2025, with 38 (46 percent) having their updates paused without public notice or explanation.
Examining the databases’ content, it appeared that vaccination data was most affected by the stealth data freezes. Of the 38 outdated databases, 33 (87 percent) included data related to vaccination. In contrast, none of the 44 still-updated databases relate to vaccination. Other frozen databases included data on infectious disease burden, such as data on hospitalizations from respiratory syncytial virus (RSV).
This post brings up an important topic regarding vaccination databases and public health. It’s crucial to stay informed about how these systems operate and their impact on community health. Thank you for sharing this information!
I completely agree that the issue of vaccination databases is crucial for public health. It’s interesting to note how transparency in these databases can significantly impact public trust in vaccines and health authorities. Ensuring accurate data access might be key in addressing vaccine hesitancy.
It’s interesting how the freezing of these databases could impact ongoing research and public trust in vaccination efforts. Transparency in data management is key to fostering confidence in public health initiatives.