Support WBURCoronavirus Testing Machines Are Latest Bottleneck In Troubled Supply ChainPlay05:15Download AudioJoel RoseMay 28, 2020 ShareMedical personnel test people in vehicles for COVID-19, at Annandale High School, in Annandale, Va., on May 23. There's a new bottleneck emerging in coronavirus testing: A shortage of the machines that process the tests and give results. (AP)