More than 700 employees of a hospital in the Detroit metropolitan area of Michigan state of the U.S. have tested positive for coronavirus, according to a report.

The chief clinical officer of Henry Ford Health System said on Monday that the infection has been found in a total of 734 health workers out of nearly 2,500 employees who have been tested — accounting for 2% of the hospital system’s 31,600 employees, news site BridgeMI reported.

“If we are to test the whole population, you are going to see large numbers of people who are testing positive,” Dr. Adnan Munkarah

Read more: US: Over 700 workers of Detroit hospital virus-infected