Well, according to this report, it's potentially terminal which is more than "annoying". And it's affecting 300,000 people which is almost 1% of the population. Not sure if I believe their number. But it is concerning that it's going undetected.
Lots of stuff is potentially terminal, including the common cold. And 300,000 people is 1/10 of 1% of the population, not almost. It’s going undetected because it remain asymptomatic for a prolonged time, not much reason to test people that aren’t sick.