Nothing in that thread explains why you'd expect outdoor transmission to drop by only 2x if the mechanism is droplet transmission.
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Replying to @Merz @jljcolorado and
Among other things, people tend to be further apart outdoors, and they tend to be outdoors when it's sunny. Pyrimidine dimers are a thing.
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Replying to @Merz @kprather88 and
I have not found data to substantiate that the conversational distance is higher outdoors than outdoors. And UV radiation inactivates the virus, but in 5-30 min, too slow too matter.
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Replying to @jljcolorado @kprather88 and
Halftimes far shorter than 5-30 minutes have been reported.
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Replying to @Merz @jljcolorado and
"I have not found data to substantiate that the conversational distance is higher outdoors than outdoors." And that's just silly.
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Replying to @Merz @jljcolorado and
No, it isn’t. Linguists study how far apart people in various cultures stand when speaking, a well studied topic and never in all my reading on that topic have any noted outdoors people stand further when speaking to one another in normal conversation.
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Replying to @gardengirl778 @Merz and
Not just that, because this has indeed been studied very well, interpersonal closeness produces *less* discomfort outdoors so people can get closer, and decades of research and measurement find that there is no indoor close/outdoor apart rule.
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Replying to @zeynep @gardengirl778 and
Do you have any links to that research? I've looked for it but not found it, probably didn't quite know how to search, keywords etc.
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Replying to @jljcolorado @gardengirl778 and
Yep. Will email lit review. "Conversational space" and "personal space" are keywords—it's a very well-studied area of sociolinguistics, and despite people making up stuff on this thread, there's decades of research. Varies by culture, gender-grouping, noise, vertical space etc.
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Replying to @zeynep @gardengirl778 and
Maybe we should write a short paper on the outdoor / indoor stuff, now that you brought up this evidence? Obviously some like
@merz dismiss it outright. I didn't spend a lot of effort on it bc it seemed so obvious!3 replies 1 retweet 19 likes
Sure. I knew of the topic from sociolinguistics, but I looked it up at more length recently because, like you, I spent a lot of time actually looking for evidence *in favor* of droplets being the main route. This was one of the potential mediators of the epidemiology data.
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Replying to @zeynep @jljcolorado and
If the evidence is there, it's there. I will be interested to see if the evidence shows that people spend comparable amounts of time together and *in the same geometries*, i.e. face to face vs. sitting next to one another.
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Professor Jimenez did not adduce any evidence beyond his personal impressions.
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