@Cathln First of all, I'm so sorry about your loss of your son. I can't imagine the pain and suffering you must be going through. About treatment for MAC, like @ginak , I was diagnosed with bronchiectasis and MAC after coughing up large amount of blood suddenly in fall of 2014. Besides that, I don't have any other lung problems and my lung condition has not been worsening since the diagnosis. So no drug treatment for me so far. I do have excess phlegm especially when I first get out of bed in the morning. I believe that is mostly the result of bronchiectasis. I agree with @ginak that everybody's situation is different. But in one way or another, everybody here has had their lungs compromised which leads to vulnerability to infections. In your situation, emotional stress can also lead to physical vulnerability. You need to see doctors who are very knowledgeable about bronchiectasis and MAC in order to keep your lung conditions under control. Hopefully others on this site are able to provide you with more suggestions and pointers. Wish you all the best.