I wonder how this relates to the general spread of the disease in a region. Denmark has a much lower rate of spread than many places in the US. The article doe

I wonder how this relates to the general spread of the disease in a region. Denmark has a much lower rate of spread than many places in the US. The article doesn't say when this was carried out. Was it when there were few active cases[1]. If this was carried out during the time with few active cases it would be like testing an umbrella by walking around with it open on a day with a low chance of rain. Doesn't do a good job of testing the umbrella. There is other research showing better protection like that at Beaumont health system[2]. This was in environments with varying levels of exposures (including nurses treating COVID patients). I wish there were more details. [1] https://www.worldometers.info/coronavirus/country/denmark/ https://www.worldometers.info/coronavirus/country/denmark/ [2] https://www.freep.com/story/news/health/2020/11/16/beaumont-study-shows-effectiveness-masks-covid-19-spread/6314336002/ https://www.freep.com/story/news/health/2020/11/16/beaumont-...