Floods, fires and volcanoes

A single sauna session sends immune cells surging through your body

ScienceDaily28 October 2026, 12:37 UTCFinland

A new Finnish study reveals that just 30 minutes in a sauna can temporarily flood the bloodstream with additional white blood cells, potentially helping the immune system patrol the body and detect threats. The surprising response resembles the immune boost seen during exercise and may help explain some of the health benefits linked to sauna bathing.

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