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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 4:41 PM CDT

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 reporter for NPR's daily science podcast, Short Wave. The podcast explores new discoveries, everyday mysteries and the science behind the headlines — all in about 10 minutes, Monday through Friday.
Regina G. Barber
Regina G. Barber is Short Wave's Scientist in Residence. She contributes original reporting on STEM and guest hosts the show.