Sauna use promotes mild hyperthermia, which induces physiological responses that reduce oxidative stress and inflammation and activate cellular defense systems.

“but there's also really profound effect on the immune system like part of the benefit of exercise is that it is an acute oxidative stress burst an acute inflammatory burst you know there's then a response to that and the net response is a positive anti-inflammatory and antioxidant response but the inflammatory and oxidant response is required to get that and something similar is happening with with the sauna as well”

“While no data suggest that sauna use has a direct effect on acute COVID-19 infection, I think there's a convincing argument that sauna use promotes broader changes in immune function that may bolster defense in a contextually beneficial way.”

“sauna use promotes mild hyperthermia which in turn induces a wide array of physiological responses these responses reduce oxidative stress and inflammation and activate cellular defense systems that provide protection against many diseases”

“heat shock proteins activate the innate immune system and sauna use has been shown to increase white blood cell and other monocyte levels”

“So the thought is, well, sauna is hopefully quite similar. And we have a bunch of data that suggests that it is looking in that direction. We still need to do the research, though.”