Amazon.com Inc. notified employees Tuesday of the first confirmed case of coronavirus among its U.S. workforce. The online retailer told workers about the infected employee via email.

The employee left work Feb. 25 due to an illness and the company said it was informed Tuesday that the person had contracted Covid-19. All co-workers in contact with the employee, who were at Amazon’s South Lake Union office complex in Seattle, have been notified, the company said.