Dr. Robin Trotman had an inkling his Springfield hospital system was experiencing a harbinger of what was to come. It was late June, and CoxHealth was seeing an influx of COVID-19 patients who had already been vaccinated, as the highly contagious Delta variant spread unchecked through the region.

Breakthrough data by occupation was released by the Southern Nevada Health District after an open-records request. Here’s how you can find the same thing in your state.

As of Oct. 15, there have been at least 575 breakthrough cases in healthcare workers and 562 in casino workers, with each occupational group representing about 6 percent of the more than 10,000 total reported cases of COVID-19 in fully-vaccinated people.