To add my own anecdote. I am easily drawn in by the numbers game and, as a result, I started to walk even in conditions that would keep me at home several years

To add my own anecdote. I am easily drawn in by the numbers game and, as a result, I started to walk even in conditions that would keep me at home several years ago. Freezing weather, rains, serious heat. My immunity has improved a lot, and I think it comes from the relentless exposure to all kinds of Central European weather. I no longer experience bouts of cold etc., and except for Covid, I didn't have anything flu-like even in winter, when there was an obvious wave of respiratory diseases all around.