Hello Marellen! Most of us with bronchiectasis and/or mac infection use nebulized saline in conjunction with our antibiotic treatments. It is considered good lung hygiene, sort of equal to washing your hands, only it's lungs. NIH (National Institute of Health) did studies that showed what strengths of saline killed specific strains of bacteriums. 7% was specific for Avium Bacterium which is mac/ntm. There is a chart that lists those, I will dig through my files and look for it. My Mayo dr had put me on the 7% saline back in 2013. I tested negative for mac by 2014. Mayo drs are held in the highest esteem worldwide, so take my drs choice of 7% as Gospel. I still nebulize saline to this day to keep my lungs clear. I have not read your link to the article yet, but I will. I think the lower % saline may work ok especially for those on the newer meds like Arikayce, I don't know for sure. For those who cannot tolerate the 7%, then go lower, some os better than none in my opinon. All I can say is; back when I first joined this group years ago, hardly anybody was on the saline. Between myself and a few others who preached constantly that we all should be doing it; most in our group here now use it. I will tell you this, when I first became a Mentor for this group; there was a lot of virtual hand-holding. Many members were so sick, crying, and scared. The symptoms of active mac infections can be quite miserable. I have noticed that as more and more of us started using the saline, the level of misery has gone down, and people are starting to test negative for mac.