Table 3.

Results of environmental monitoring of SARS-CoV-2 in the DEA Department in March 2021.

Sampling site	Sampling method	PCR	PCR positivity cycle	PCR challenge test
Close air (<1 m) at patients at 1.5 m of height for 1 h	bubbler sampling	positive	39.2	negative
Close air (<1 m) at patients at 1.5 m of height for 3 h	bubbler sampling	negative	>40	negative
Far air (>3 m) at patients at 1.5 m of height for 1 h	bubbler sampling	negative	>40	negative
Far air (>3 m) at patients at 1.5 m of height for 3 h	bubbler sampling	negative	>40	negative

NT, not tested.

Notes: Boundary conditions on the day of sampling 25-03-2021.

- Positive patients present in the ward: 29.

- Positive patients present in the open space where the sampling took place: 7.

- Volume of the open space: 180 m³

- Air volume per patient: 25.7 m³

- Indoor thermohygrometric conditions: T 22.9 °C - R.H. 40.9%.

- Air flow extracted from the vent installed in the open space: 2465 m³/h.

- Hourly extraction volumes: 13.65.