active monitoring of persons exposed to patients without confirmed covid-19
active monitoring of persons exposed to patients without confirmed covid-19
on january 20, state and local health departments in the united states, in collaboration with teams deployed from cdc, began identifying and monitoring all persons considered to have had close contact with patients with confirmed covid-19 ( 2 ).", "the duration of time in the same airspace after the patient with confirmed covid-19 was applied differently by health jurisdictions.")