11-18-2020, 08:53 PM
Disappointing study from Denmark which suggests that wearing a mask doesn't protect the wearer.
https://www.acpjournals.org/doi/10.7326/M20-6817
Now, the study was underpowered, and wouldn't preclude a moderate effect:
BC
https://www.acpjournals.org/doi/10.7326/M20-6817
Quote:The recommendation to wear surgical masks to supplement other public health measures did not reduce the SARS-CoV-2 infection rate among wearers by more than 50% in a community with modest infection rates, some degree of social distancing, and uncommon general mask use. The data were compatible with lesser degrees of self-protection.
Now, the study was underpowered, and wouldn't preclude a moderate effect:
Quote:Although the difference observed was not statistically significant, the 95% CIs are compatible with a 46% reduction to a 23% increase in infection.
BC