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. 2021 Feb 23;21:393. doi: 10.1186/s12889-021-10418-3

Table 3.

Frequency of mask usage by type of mask used and time point; Poland, 2020; n = 750–818

Type of mask 11.05 18.05 25.05
Usage Correct usage Usage Correct usage Usage Correct usage
n % n % n % n % n % n %
Cloth mask 357 64.7% 231 64.7% 339 62.3% 204 60.2% 323 62.6% 176 54.5%
Medical mask 129 23.4% 83 64.3% 155 28.5% 102 65.8% 139 26.9% 84 60.4%
N95 respirator 20 3.6% 16 80.0% 12 2.2% 10 83.3% 18 3.5% 17 94.4%
Face shield 12 2.2% 11 91.7% 7 1.3% 6 85.7% 8 1.6% 8 100.0%
Othera 34 6.2% 23 67.6% 31 5.7% 17 54.8% 28 5.4% 19 67.9%

ascarf/bidon

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