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

NPR | By Emily Kwong,
Regina G. Barber
Published April 2, 2026 at 5:41 PM EDT

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.

Copyright 2026 NPR
Emily Kwong
Emily Kwong (she/her) is the founding reporter and now co-host for Short Wave, NPR's science podcast.
Regina G. Barber
Regina G. Barber is a co-host of Short Wave, NPR's science podcast.

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