What to know about Tennessee's new COVID-19 breakthrough case data

Staff photo by Troy Stolt / Robin Hoffecker fills doses of the Pfizer COVID-19 vaccine during a student vaccination event at Chattanooga State on Friday, Aug. 20, 2021, in Chattanooga, Tenn.

As the omicron variant drives an increasing number of COVID-19 infections in fully vaccinated people, a new data dashboard from the Tennessee Department of Health offers the most detailed picture of these so-called "breakthrough cases" in the state to date.

In the past week, an average of 35 new COVID-19 cases per 100,000 fully vaccinated Tennesseans occurred compared to a weekly average of eight new cases per 100,000 fully vaccinated Tennesseans a month ago.

By comparison, during those same time frames, Tennesseans who are not fully vaccinated saw an average of 68 COVID-19 cases per 100,000 residents compared to a weekly average of 24 a month ago.

The dashboard notes recent cases that have occurred within roughly 10 days may not yet be reflected in the data, and health officials said a significant rise in at-home testing is also causing many positive cases to go unreported.