After weeks of stalled testing for the coronavirus, the United States now has enough diagnostic kits to test 75,000 people, with more on the way, Alex M. Azar II, the health and human services secretary, said on Sunday. The Trump administration has faced widespread criticism for a slow and scattered delivery of testing materials to states, where only 12 labs are capable of diagnosing the virus. Mr. Azar’s announcement, on CBS’s “Face the Nation,” came a day after the Food and Drug Administration announced that it was giving laboratories and hospitals across the country the go-ahead to conduct tests that had been severely limited to those analyzed by the Centers for Disease Control and Prevention. That decision should improve the pace of detecting coronavirus infections and make it possible to more rapidly spot patterns of suspected or confirmed cases. That could be most immediately valuable on […]