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@BeckyQuick There appear to be two factors that limit the spread: effective contact tracing and whole population use of masks.

@TectonixGEO created this animation using cell phone GPS data. Google and Apple have the same data for most of the population. When someone tests positive, why aren't they providing direct and indirect contacts with contact information within minutes?

businessinsider.com/countries-trac…
Countries that have controlled the epidemic have widespread use of masks. The masks are not to protect the wearer. They are to prevent the wearer from spreading more than trivial amounts of the virus.

journals.plos.org/plospathogens/…
Czechia, South Korea, Mongolia all have masks. Taiwan brags that is making 10M masks/day with a population of 27M.

The masks can be very simple. They can be homemade. They can be made without sewing. Instructions are on the Internet.

It would appear the combination would lead to more rapid isolation of newly infected individuals and a sharp reduction in R0.

How do we get this investigated implemented?

Note that these can be implemented for minimal costs. People may aggressively implement homemade masks on their own.
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