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As of december 7, 2020 the food & drug administration has approved emergency use authorizations for almost 300 different tests, included diagnostic and serol. Harvard professor and epidemiologist michael mina, md responds to the idea that inexpensive athome coronavirus tests would produce too many false positives. As of december 7, 2020 the food & drug administration has approved emergency use authorizations for almost 300 different tests, included diagnostic and serol.