The wet and warm medium in lungs of the person perfectly is suitable for reproduction of funguses, and those learned to move into there long ago. Every day the person inhales from 1000 to 10 billion spores, but instead of waging with them ruthless war, our immune system gracefully forces spores to make a suicide. Alas, this unique mechanism even more often began to glitch and scientists try to understand what can be made with it.
