As of October 25, 2025, nearly half (38 out of 82) Centers for Disease Control and Prevention (CDC) databases that are typically updated monthly experienced unexplained pauses in 2025, and 34 had not been updated in at least 6 months. 87% (33 out of 38) of the affected databases reported vaccination information, while none of the databases that continued to be updated regularly were related to vaccines.
The findings are part of a report by Jeremy Jacobs, MD, MHS, of Vanderbilt University, and other researchers who reviewed 1,359 CDC databases, focusing on 82 that are traditionally updated monthly. Their focus was on whether the databases had stopped updating without explanation, such as a public notice or banner. Of the 38 paused databases, many reported on influenza, Covid-19, RSV, or all three vaccinations.
According to Jacobs and colleagues, “[t]his study offers an example of the public health threat of failing to update federal databases without notification and serves as a warning that these changes may also affect other federal data unbeknownst to the American public. When federal surveillance data become unavailable or outdated, professional societies and governmental advisory panels must proceed with incomplete evidence or delay guidance, leaving clinicians without clear direction.”