Synopsis

Published in 2026, this Science Friday segment explores the idea that exposing children to certain types of “good” dirt—such as outdoor microbes—can strengthen their immune systems and support long-term health. Drawing from experts like microbiologist Jack Gilbert and pediatric epidemiologist Amber Fyfe-Johnson, it highlights how early microbial exposure may benefit gut health and immune development, while cautioning that not all grime is equal. The piece encourages balanced outdoor play as part of evidence-based child wellness practices.

Article

Here’s the link to both an audio version and a transcript:

A Little Grime Can Boost Kids’ Health. But What Kind?

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