An interesting perspective, but it is taking a veryyyyy small amount of evidence and extrapolating to try and shut down what we understand through established medical science.

It's well known that we can regulate both our immune system and autonomic nervous system. Some meditators can regulate their ANS extremely well, and it's long been documented that mood has a massive impact on immune function.

What Mr Hofs research is lacking is a placebo group... with that his results might have held a lot more credibility.