Accuracy Still Unknown for Many Coronavirus Tests Rushed Out
How accurate are the coronavirus tests used in the U.S.? Months into the outbreak, no one really knows how well many of the screening tests work, and experts at top medical centers say it is time to do the studies to find out. When the new virus began spreading, the Food and Drug Administration used its emergency powers to OK scores of quickly devised tests, based mainly on a small number of lab studies showing they could successfully detect the virus. That’s very different from the large patient studies that can take weeks …