4 ms·
The study makes several references to "crowded" areas, and concludes that outdoor air is "safe" apart from these spaces. However, I was unable to find any clari
by dgritsko 6y ago
The study makes several references to "crowded" areas, and concludes that outdoor air is "safe" apart from these spaces. However, I was unable to find any clarification for what constitutes a "crowded" space (or not). I am not sure what the benefit of this study is supposed to be absent such a definition - am I missing something?
- umvi 6y agoI would assume "crowded areas" are areas where there are more than 1 person per [pi * <social distance recommendation>^2] So as a rough example, let's say social distancing recommendation is 6ft (this changes by jurisdiction). Then for a football field to be "crowded" you would need more than 57,600 / (pi * 36) = ~510 people evenly distributed on it. If the social distancing recommendation is 20ft, then you can only have 57,600 / (pi * 400) = 45 people on the football field before it starts getting crowded.
- everdrive 6y agoYour assumption is certainly a good one, but this should really be called out explicitly in the article. Perhaps the authors have a different idea about what constitutes a "crowded area."
- ummonk 6y agoWell this assumes uniform spacing between people. In reality it would be somewhat Poisson-like.
- DominikPeters 6y agoMy reading is that the authors were unable to find any air with appreciable COVID levels, but they’ve just added the caveat that maybe they didn’t find a sufficiently crowded area to take a sample.