TABLE 1.

Results (mean ± SD) of the log‐transformed viral copies per square centimeter for each experimental run and target

Exp. run	Target	PPE configuration	Suction	Log₁₀ viral copies/cm²
1	Mouth	With surgical mask	NO HVE	0.317 ± 0 ^* c
2	Mouth	With surgical mask	HVE	0.317 ± 0 ^* c
3	Mouth	With FFP2 mask	HVE	0.317 ± 0 ^* c
4	Mouth	With FFP3 mask	HVE	0.317 ± 0 ^* c
5	Mouth	With surgical mask and face shield	HVE	0.317 ± 0 ^* c
6	Mouth	With FFP2 mask and face shield	HVE	0.317 ± 0 ^* c
7	Mouth	With surgical mask + H₂O₂ 30 s	NO HVE	0.317 ± 0 ^* c
8	Mouth	With surgical mask + H₂O₂ 60 s	NO HVE	0.317 ± 0 ^* c
1	Mask	With surgical mask	NO HVE	1.249 ± 0.372 a
2	Mask	With surgical mask	HVE	1.214 ± 0.538 a
3	Mask	With FFP2 mask	HVE	1.365 ± 0.519 a
4	Mask	With FFP3 mask	HVE	1.391 ± 0.630 a
5	Mask	With surgical mask and face shield	HVE	0.317 ± 0 ^* c
6	Mask	With FFP2 mask and face shield	HVE	0.317 ± 0 ^* c
7	Mask	With surgical mask + H₂O₂ 30 s	NO HVE	0.317 ± 0 ^* c
8	Mask	With surgical mask + H₂O₂ 60 s	NO HVE	0.317 ± 0 ^* c
1	Forehead	With surgical mask	NO HVE	0.783 ± 0.212 b
2	Forehead	With surgical mask	HVE	0.711 ± 0.164 b
3	Forehead	With FFP2 mask	HVE	0.698 ± 0.160 b
4	Forehead	With FFP3 mask	HVE	0.776 ± 0.205 b
5	Forehead	With surgical mask and face shield	HVE	0.633 ± 0.076 b
6	Forehead	With FFP2 mask and face shield	HVE	0.669 ± 0.177 b
7	Forehead	With surgical mask + H₂O₂ 30 s	NO HVE	0.317 ± 0^* c
8	Forehead	With surgical mask + H₂O₂ 60 s	NO HVE	0.317 ± 0^* c

Different letters indicate significant differences between groups (Tukey's test, p < .05).

^{^*}

Under the detection limit, determined to be equal to 4 viral copies/sample.