@coachmary you know all of my PFTs were normal too. Gosh I think this discussion was quite awhile back. Anyway a year or more after Covid I was tested for allergies and discovered I developed a slew of them, both food and environmental that I’d never had before. Weird but not uncommon I’m told. I always react with upper respiratory phlegm and use the inhaler occasionally to clear it. I was also extremely dry and excessively thirsty. The interesting diagnosis I ended up with is Sjogren’s.