I saw the posting by @amn17 but did not think my response would offer much help. Although I have been diagnosed with MAC, I do not have any of the symptoms many others have, such as weight loss, fatigue, etc. I'm not on any drug treatment and, therefore, do not suffer any side effects. So I have no problem holding down a full-time job. Also, my line of work is vastly different. I'm a computer programmer. I spend majority of my working hours sitting in front of a computer rather than standing up. I don't have other underlying diseases or weakened immune system either. Hopefully others are able to provide more valuable opinions and insight on this topic.