*sigh* Dumpster fire in the US, dumpster fire in the thread this week. Anyway...
I was able to read this article on my phone, but run into the paywall on my laptop. Study from South Korea about a student with no clear exposure who came down with COVID (no positives in her community for 2 months). Via extensive contact tracing and using cell phone data mapping, they identified the infection as occurring in a restaurant. An out-of-town visitor infected 3 people who were sitting "down wind" of the flow from the air conditioner. The student was sitting 20 feet away and only overlapped the infectious person for 5 minutes. They concluded that the air circulation patterns in the restaurant, the direction the affected diners were facing created a valley of wind, in which the people on a specific line were infected. A reminder that mitigation is not a complete elimination of risk and given the right circumstances spread can happen.
A South Korean study raises concerns that six feet of social distance may not be far enough to keep people safe from the coronavirus.
www.latimes.com