The United States needs to ramp up testing for the coronavirus as the White House considers when and how to lift stay-at-home restrictions and lockdowns triggered by the pandemic, U.S. health experts said on Sunday. More than 2 million tests have been done in the country so far, but the tests are not available to many who need them, said Dr. Stephen Hahn, commissioner of the Food and Drug Administration. President Donald Trump last week played down the importance of testing, saying, “It’s not necessary but it would be a good thing to have.” Top experts on the White House coronavirus task force have made it clear testing is important, however, particularly as the country takes its first steps toward reopening, a move the Republican president has said he wants to make as soon as possible. “Further ramping up testing, both diagnostic as well as the antibody tests, will really be necessary as we move beyond May and into the summer months and then into the fall,” Hahn said.