A data breach at the Wyoming Department of Health publicly exposed COVID-19 , influenza and blood alcohol test data from more than a quarter of Wyomingites and some out of state residents , the department announced Tuesday . The breach occurred when an employee erroneously uploaded files containing that data to the public code - hosting platform GitHub . Data for more than 164,000 individuals was uploaded to the site , according to the health department . More than 145,000 people affected are believed to be Wyoming residents who received a COVID-19 or influenza test between January 2020 and March 2021 . Blood alcohol test data involved just over 18,000 people , most of whom are Wyoming residents , according to the health department . ;