Although it looked like spam, he partnered with a university to study the &#x27;immune modulation&#x27;. <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Wim_Hof#Scientific_research" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Wim_Hof#Scientific_research</a>