Table 1.

Sampling locations

Location code	Brief description	Details
ED	Emergency department provider workstation	Provider computer workstation across from two-negative pressure rooms used for suspect COVID-19 patients
ICU	Outside entrance door to COVID-19 ICU	In a corridor outside main entrance to the COVID-19 medical ICU
CW1	Corridor outside COVID-19 ward entrance	Midway through the study (May 12–18, 2020), this location was closed and cleaned; vacant on May 19; and later opened May 20 as a non-COVID-19 ward that includes a smaller unit that cared for suspected COVID-19 patients
CW2	PPE donning room outside COVID-19 ward	PPE donning room that exits into a corridor to a second COVID-19 medical ward
NCW	Nursing workstation in non-COVID-19 ward	Open work area with computer workstation to chart patient notes and exchange information at shift changes

ED emergency department, ICU intensive care unit, CW1 COVID-19 Ward 1, CW2 COVID-19 Ward 2, NCW non-COVID-19 Ward