Answers are grounded in this paper and cite their sources.
Daily testing for coronavirus infection in the United States is finally approaching levels seen in other developed countries.This follows nearly two months in which tests were difficult to obtain even with a doctor's request.
No takes yet. Share an insight, caveat, or question.
Owen Dyer (2020) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: