Why Herd Immunity Won't Save Us

Published: Aug. 10, 2020, 8 a.m.

Herd immunity. It's the idea that enough people become immune to an infectious disease that it's no longer likely to spread. It makes sense theoretically. But as NPR's Geoff Brumfiel tells us, the reality \u2014 in this coronavirus pandemic and without a vaccine \u2014 is potentially full of risk and maybe even unachievable.

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