I've just discovered another reason I'm keeping my masks when all this brouhaha is over.
Two nights ago I woke up in the middle of the night with post-nasal drip and a persistent cough. I was too tired to recognize the symptoms at the time, but the morning's "snowfall" made the cause clear: it's oak pollen season again. The last thing I had done before going to bed had been to take some mild exercise on the back porch, in the cool of the night. It usually helps me sleep—but not when it sends oak pollen deep into my lungs.
Last night I had an inspiration, and did my bedtime exercises while wearing my mask. Porter can't wear a mask while exercising because it immediately gets drenched with sweat. But did I mention that these are mild exercises? Not a problem. A little weird, but okay. And of great benefit: I slept very well. (I would have said, "like a baby," but in my experience babies wake up every two hours or so at night and want to eat. Who made up that simile, anyway?)
Two data points aren't enough for correlation, let alone causation. But they are enough for hope.