COVID-19 cases in Japan plunged by Sept. — and have stayed there. Experts can't pinpoint why

03:47

December 23, 2021

Anthony Kuhn, NPR

COVID cases in Japan fell more than 99% from the last peak. Unlike previous infection waves and countries in similar situations, it's largely staying there.

As NPR's Anthony Kuhn reports, experts are struggling to explain why.

This segment aired on December 23, 2021.

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