Covid-19 vaccine must protect 50% of people for approval, FDA says (arstechnica.com)

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Seems like an awfully low bar, but I suppose we can go for progressive enhancement, so long as it's also safe.

It's not spreading that fast right now. https://covid19-projections.com/infections-tracker/ Cutting the average rate by half means we can roll back a bunch of restrictions and still be below 1.

Interesting as Fauci has said he'd "settle" for 70-75%. This seems too low.