Your government at work [Rooters] California, Nebraska and Illinois are the only U.S. states that can currently test for coronavirus, the Association of Public Health Laboratories told Reuters. The CDC last week said some of the testing kits sent to U.S. states and at least 30 countries produced "inconclusive" results due to a flawed component, and the CDC planned to send replacement materials to make the kits work. The CDC has increased testing capacity until new testing kits become available, said Scott Becker, the executive director of APHL, which represents public health laboratories in the United States.