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

This analysis (4 non-randomised studies; n=7688) found face mask use was associated with a reduction in the risk of Covid-19 infection (pooled RR 0.12; 95% CI 0.06-0.27; P<0.001). The authors note its limitations and call for randomised studies of protective options.

Source:

European Journal of Medical research