NPR
People are getting the results of coronavirus tests in the U.S. faster than they were in the spring, but testing still takes far too long to help effective disease control measures such as contact tracing and quarantining, according to the results of a large national survey. … Hispanics and African-Americans are waiting about a day longer than whites on average ... The researchers also found that a disturbingly high proportion of those testing positive — almost half — are never contacted by a health worker to determine who they may have infected, a crucial step for preventing outbreaks.