CNN Business  — 

Walmart announced an emergency leave policy after one of its employees in Cynthiana, Kentucky, tested positive for coronavirus, according to a memo sent to employees.

The employee’s condition is improving, and she is receiving medical care, according to a memo from John Furner, US CEO of Walmart, Sam’s Club CEO Kath McLay, and Donna Morris, Walmart’s Chief People Officer.

Walmart (WMT), the nation’s largest private employer, has been in contact with health experts and will “continue to take precautions and actions to keep our stores, clubs and other facilities clean and ensure the well-being of our associates, customers and members.”

The are at least 849 cases of coronavirus in the US, according to the state and local health agencies, governments and the US Centers for Disease Control and Prevention.