I have an interesting FYI for you all. I have had this nasty thick phlegm since covid last March. Unable to sleep, always spitting it out. It was depressing living like that. Well, I caught an intestinal bacterial infection, diverticulitis, and was put on antibiotics. 5 days in hospital and 14-day outpatient with a PIIC line. As soon as I was put on the antibiotics, the phlegm completely stopped. It has been almost a month now. I don't know how or why it stopped but I think it had to have been something with the antibiotics, but they are supposed to be for bacteria, not viruses. I just stopped the antibiotics yesterday. Praying it does not come back.