After March 13 , the CDC had registered more than 18,000 tests , more than 3,960 were performed by them and more than 14,000 by US public health labs during the coronavirus pandemic .
As of March 13 , the CDC reported that 16,542 specimens had been tested for COVID-19 , 3958 of which were tested by CDC labs , and 12,584 tested by U.S. public health labs.
2020 coronavirus pandemic in the United States