I have HEPA filters on the house’s air intake and charged then twice during The Smoke, and once after; all three times they were heavily clogged.

I also had massive, massive headaches and eventually had to buy one of those indoor air filterer machines. I’d always kinda thought of them as a scam, but I turned it on and the sensor alerted right away and the machine kicked on. Ran for like an hour before it turned itself off again, and my headaches cleared up afterward. It’s a nice little machine.