Table 1.

Summary of the RNA SARS-CoV-2 measurements in the air of the monitored hospital areas.

Covid-19 patients	Location	n	Positive identification	Cycle threshold (Ct)		Copies/m3
			%	min	max	average	sd	median	min	max
Yes	Roomsa	11	100	33.24	36.13	2600	1500	2500	700	5800
Yes	Room corridora	12	100	33.03	34.49	4400	1300	4400	2300	6200
Yes	ICU corridor a	10	30	35.82	36.56	190	320	0b	0	880
No	Room corridora	10	50	36.54	44.25	180	240	0	0	550
No	Outdoor terracea	4	25	37.47	37.47	73	150	0	0	290

^aLocation of the samples shown in Fig. 1

^bAs mentioned in the positive identification column, not all samples showed airborne RNA. In these samples a value of 0 copies/m³ was assigned.