Table 1.

Environmental sampling results from COVID-19 isolation units of Hospitals A and B

Sampled area	Sampled objects	No. of RNA-positive samples/total no. of samples (%)	RT-PCR Ct value range of positive samples (average)
Patient rooms (1–3 patients in mild condition)	Floor	2/3 (67%)	33.9–38 (36)
	Bed rail	1/3 (33%)	39 (39)
	Bedside table	2/4 (50%)	35.4–39.8 (37.6)
	Faucet handle	2/2 (100%)	30.3–32.1 (31.2)
	Patient's mobile phone	0/4 (0%)	NA
	Patient's eyeglasses	1/1 (100%)	35.2 (35.2)
	Patient's walker	1/1 (100%)	34.4 (34.4)
	Air sampling filter	0/3 (0%)	NA
	Total	9/21 (43%)	30.3–39.8 (35.3)
Ventilated patients' rooms (invasive and non-invasive ventilation)	Bed rails	4/5 (80%)	30–36.4 (33.9)
	Faucet handle	2/2 (100%)	33.1–33.6 (33.3)
	Ventilator (touch screen)	2/2 (100%)	33.9–35.1 (34.5)
	Staff computer mouse	2/3 (67%)	33.4–36.6 (35)
	Staff mobile phone	1/2 (50%)	35.1 (35.1)
	Bedside table	1/1 (100%)	33.7 (33.7)
	Trash bin top	0/1 (0%)	NA
	Bench top	0/1 (0%)	NA
	Air sampling filter	1/1 (100%)	34.1 (34.1)
	Total	13/18 (72%)	30–36.6 (34.2)
Patient's toilets	Toilet seat	1/1 (100%)	33.2 (33.2)
	Handle grip	1/2 (50%)	36.3 (36.3)
	Door handle	1/1 (100%)	34.5 (34.5)
	Total	3/4 (75%)	33.2–36.3 (34.7)
Nurse station	Floor	0/1 (0%)	NA
	Bench top	1/1 (100%)	31.7 (31.7)
	Computer mouse	0/1 (0%)	NA
	Staff mobile phone	0/1 (0%)	NA
	Glucometer	0/1 (0%)	NA
	Electric thermometer	1/1 (100%)	35.4 (35.4)
	Blood pressure cuff	0/1 (0%)	NA
	Air sampling filter	1/1 (100%)	38.8 (38.8)
	Total	3/8 (38%)	31.7–38.8 (35.3)
Doffing area	Floor	0/1 (0%)	NA
	Door handle	1/1 (100%)	38.1 (38.1)
	Trash bin top	0/1 (0%)	NA
	Air sampling filter	0/1 (0%)	NA
	Total	1/4 (25%)	38.1 (38.1)
All areas	Total	29/55 (51%)	30–39.8 (37.4)