Table 3.
Number of positive results for SARS-CoV-2 detected in each size fraction relative to total size fractions collected (TSF; N = 14), as well as the contribution (CON, %) of positive results in the total super- (N = 8) and sub-micrometric (N = 6) particle size fractions in all sample sets analysed from different environments (Intensive care unit patient room, ICUR; Respiratory centre patient room, RCR; Respiratory centre medical staff workstation, MSW; home care). RCRL samples were collected while patients were supported by low flow (LF), whereas RCRH were collected while patients were supported by high (HF) flow nasal oxygen therapy.
| Size range | ICUR 1 | ICUR 2 | RCRL 1 | RCRL 2 | RCRL 3 | RCRL 4 | RCRH 5 | RCRH 6 | RCRH 7 | MWS 1 | MWS 2 | Home care | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CON (%) |
TSF | 2/14 | 4/14 | 5/14 | 7/14 | 8/14 | 7/14 | 7/14 | 8/14 | 8/14 | 8/14 | 10/14 | 2/14 |
| >1 μm | 33.3 | 50.0 | 83.3 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 16.7 | |
| <1 μm | 0 | 12.5 | 0 | 12.5 | 25.0 | 12.5 | 12.5 | 25.0 | 25.0 | 25.0 | 50.0 | 12.5 |