Hi, my mum has bronchiectasis, I have bronchiectasis, and my younger sister now diagnosed with it. My sister and myself also have MAC. My mum is being tested for the same. I believe bronchiectasis can be hereditary but doubt MAC is.
It is stated most people with MAC have bronchiectasis too. So we are more susceptible to picking up Viruses and bacterial infections. We have been taught to airway clearance huffing not coughing. Hope this helps!