The thing about it being found mostly in immunocompromised people suggests it could be a fairly common and widespread organism but most people shrug it off.
I recall hearing a hypothesis that one consequence of global warming might be an uptick in opportunistic fungal infections. Warm-bloodedness might be largely an adaptation to make the human body uninhibitable by environmental pathogens, but as warming pushes tropical areas to long sustained stretches of temperatures above 98.6F, it acts a selective pressure for organisms to evolve such that they can now thrive in the body.
Everything bad is related to global warming these days, it seems.