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This week in science: How much exercise you need, flu resistance and fortified food

NPR's science podcast <em>Short Wave</em> brings us stories on food fortification, why some people don't seem to get the flu, and a study on how much vigorous exercise you really need.

Published April 2, 2026, 9:41 PM
Updated April 2, 2026, 9:51 PM3.5K
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This week in science: How much exercise you need, flu resistance and fortified food

4.2.2026 SHORT WAVE NEWS ROUNDUP

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NPR's science podcast Short Wave brings us stories on food fortification, why some people don't seem to get the flu, and a study on how much vigorous exercise you really need.

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