|
Heinzerling et al. [19]
|
USA
|
37
|
A strong association of proximity of the exposed individual without face mask with the risk of infection
|
0.03 (0.002–0.54)
|
|
Doung-ngern et al. [18]
|
Thailand
|
1716
|
All time wearing face masks associated with lower risk of SARS-CoV-2 infection compared to individuals who do not wearing face masks
|
0.23 (0.09–0.6)
|
|
Wang et al. [21]
|
China
|
493
|
Precise occupational protection is necessary for fighting COVID-19
|
0.04 (0.002–0.63)
|
|
Wang et al. [20]
|
China
|
5442
|
Inadequate protection leads to higher risk of infection in medical staff members
|
0.03 (0.004–0.19)
|
