Support WBURWhy The Warning That Coronavirus Was On The Move In U.S. Cities Came So LatePlay03:51Download AudioLauren SommerApril 24, 2020 ShareA pathologist holds a vial from a COVID-19 test kit. Various bottlenecks in the U.S. that have constrained widespread testing for the coronavirus were problems in February and persist today. (Bloomberg via Getty Images)
