COLUMBUS, Ohio — Several people are being asked to self-isolate after a worker at a children’s hospital tested positive for the COVID-19 coronavirus.

WCMH Channel 4 reports that Nationwide Children’s Hospital has confirmed the employee who tested positive worked in the hospital’s child care center. The center has been closed until further notice.

The employee showed no symptoms while working Monday and Tuesday with two other workers, helping to take care of 11 children, WSYX Channel 6 reports. On Wednesday the employee called in sick. The employee was tested at the hospital.

The two other workers, as well as the families of the 11 children have been contacted and are being asked to self-isolate at home for 14 days, WBNS Channel 10 reports.

“Although no other children are believed to have had contact with this employee, approximately 150 other families whose children are served by the center were notified of these events and will be monitored by the hospital,” the hospital said in a statement, according to WBNS.

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