Agree that ground glass appearance on chest CT is not the definitive diagnostic test to determine if an individual is infected with a COVID-19. If however if a patient is seriously ill with respiratory impairment and a chest CT is performed, that ground glass infiltrate is almost pathognomonic of COVID 19 infection in the acute setting. CT chest scans are typically done in American ICUs in people who develop an acute pneumonitis wit respiratory impairment As the diagnostic kits become available numerous people will be diagnosed with CODID-19 “infection”. However not until there is a huge increase of chest CT’s with the ground glass infiltrates, the disease is not causing China and Korea type outbreaks in the United States.
Or a large number with ARDS no matter what the CT shows, which is a more clinically important indicator