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Why The U.S. Can’t Process Coronavirus Tests As Fast As South Korea

In South Korea, COVID-19 patients can get tests results back in as little as 24 hours. In the U.S. it typically takes three to five days. Why does it take so long in the U.S.? Senior Science Writer Maggie Koerth explains.

For a deeper dive, learn how the coronavirus test works.

Anna Rothschild is FiveThirtyEight’s senior editor for video.

Maggie Koerth is a senior science writer for FiveThirtyEight.