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. 2020 Sep 21;133:104997. doi: 10.1016/j.ssci.2020.104997

Table 3.

Distribution of results (matrix).

Type of mask Behavior
OK NOSE NOT COVERED CHIN NOT COVERED NOSE & MOUTH NOT COVERED
Surgical mask: 622 194 224 135 69
FFP2/FFP3 type (no valve): 118 16 49 26 27
FFP2/FFP3 type (with valve): 129 37 46 33 13
Diy type: 153 17 97 18 21
Total: 1022 264 416 212 130