Thanks for writing this. Yesterday I started an online rehab program my Bronch/Mac pulmonologist urged e to do. Three times a week, 90 minutes for 12 weeks. (Aaaaargh!) Zoom, 4 people like e in the class. When the therapist/leader heard me talk she heard congestion I’ve had for a few weeks. She urged me to nebulize my saline after class which would add a 3rd session for me. I have a call in to my doctor to ask antibiotic or extra Neb. with saline. My oxygen at 91 in class when others at 96. I don’t want to do any of this but I know I have to.