Thank you - I think TB history when younger is also part of reason of MAC later in life. Unfortunately many MAC patients have family member with lung disease, so I think it is genetic make up. Life style and diet is really important, like you said, those are excellent points! Exercise should be tailor made for everyone too. Mild to moderate may be the best fit for MAC patients. High stress exercise may harm the immune system. Everyone is unique and we have to learn from everyone but find the best way for our unique condition. Wish you the best luck too!