Skip to main content

Table 1 Studies showing the association of face mask use with COVID-19 infection

From: Airborne transmission of COVID-19 and the role of face mask to prevent it: a systematic review and meta-analysis

Study (year) Country Sample size (n) Main findings RR (95% CI)
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)
  1. RR relative risk