More evidence/data likely in favor of masks. Also need to study carefully what other characteristics may have been relevant in terms of the layout/physical spaces; individuals; as well as NPIs.https://twitter.com/zeynep/status/1270455405324402688 …
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Health departments usually will have this information, but not sure that it all gets reported to the media. I help w/ reviewing some CDC investigations as well, which usually end up in their Emerging Infectious Diseases Journal, but there is a notable lag obviously.
The big Chinese review of contact tracing suggests that positive contacts of cases who never become symptomatic are not a big source of spread, which is helpful because it means we don't have to trace THEIR contacts UNLESS they become symptomatic. The WHO debacle started there.
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