Whitehouse Centers for Disease Control and Prevention US Department of Homeland Security - Federal Emergency Management Agency

Why do some case numbers reported by state health departments, Johns Hopkins, and the World Health Organization (WHO) sometimes differ from what is posted on CDC’s website?

CDC’s overall case numbers are validated through a confirmation process with jurisdictions. The process used for finding and confirming cases displayed by different places may differ.

Case numbers reported on other websites may differ from what is posted on CDC’s website because CDC’s overall case numbers are validated through a confirmation process with each jurisdiction. Differences between reporting jurisdictions and CDC’s website may occur due to the timing of reporting and website updates. The process used for finding and confirming cases displayed by other sites may differ.

Last updated June 25, 2020
Source: Centers for Disease Control and Preventionlinks to external site

See also: COVID-19 facts