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A Marm Kilpatrick Profile picture
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17 Feb, 6 tweets, 2 min read
What is the relative risk of indoor vs outdoor dining?

COVID-19 cases are falling and indoor dining has resumed in NYC & elsewhere.

It should be possible to quantify the relative risk of indoor vs outdoor dining.
Thread
nytimes.com/2021/02/12/nyr…
Many people argue that indoor dining represents a high risk for transmission of SARS-CoV-2, b/c people can't wear masks while eating, people from multiple households often sit at 1 table & at least 2 case studies show cross-table transmission is possible.
jkms.org/DOIx.php?id=10…
Outdoor dining is thought to be (much) safer, due to much higher ventilation. But we still don't know the relative risk of indoor vs outdoor dining, which would be extremely valuable in determining the relative risk of re-opening these activities.
Data to answer this question would be relatively easy to collect (& may already exist) in places where indoor & outdoor dining occur. One could simply test contacts of cases whose only contact was through an indoor or outdoor meal.
Including adjustments for auxiliary variables like duration of meal, additional exposures of contacts, etc. would help focus on differences in the setting itself (indoor vs outdoor).
Does this study already exist? (please give link!)
If not, do the data already exist from states that have indoor & outdoor dining? If so I hope they can be analyzed to address this important Q.

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