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Table 2 Concentration of SARS-CoV-2 (copies m−3) for each 48-h sampling period starting the morning of the start date

From: Characterization of hospital airborne SARS-CoV-2

Dates Size ED ICU CW1 CW2 NCW Probability of positive sample Average number of COVID-19 patients in hospital
(start–end)
29 April–1 May F 0 7 0 0 0 3/15 33
  C 0 0 0 0 0
  L 0 5 0 0 12
5 May–7 May F 0 0 0 0 0 2/15 24
  C 8 0 0 0 5
  L 0 0 0 0 0
11 May–13 May F 0 0 0 0 0 2/15 17
  C 0 0 9 0 0
  L 0 0 0 0 47
13 May–15 May F 51 0 0 0 0 1/15 14
  C 0 0 0 0 0
  L 0 0 0 0 0
18 May–20 May F 0 0 0 0 0 0/15 9
  C 0 0 0 0 0
  L 0 0 0 0 0
20 May–22 May F 0 0 0 0 0 0/15 7
  C 0 0 0 0 0   
  L 0 0 0 0 0
Number of positive samples   2 2 1 0 3   
Total number of samples (size fractions)   18 18 18 18 18   
  1. ED emergency department, ICU intensive care unit, CW1 COVID-19 Ward 1, CW2 COVID-19 Ward 2, NCW non-COVID-19 Ward, F fine, ≤ 2.5 µm; C coarse, 2.5–10 µm; L large, > 10 µm