Joseph Meehan writes:

If you don't have dust mites, you are one of the 13 people world
wide that don't. They are everywhere.

I don't believe it. What's your source for that claim, duct cleaning
advertisements?

I hunted with a microscope through fistfuls of dust bunnies from my house
looking for dust mites. All I found was ... dust.

My advice is if you have a problem you think may be dust mites, it
is worth the trip to the doctor to find out.

Right, a psychiatrist.

Just what "problem" is uniquely caused by this creature that a physician
could possible diagnose?