Tell me a little bit more about this "...My wife got MAC after sitting next to a hacking cougher on a plane..."
What other issues does your wife have that would make her vulnerable to a MAC infection? How long between her exposure on the plane and her diagnosis with MAC?

How do you know the cougher had NTM? There can be many reasons for a cough that do not have anything to do with NTM.

@jkarson003 that is my fear! I know , last summer someone who was diagnosed BE and MAC was coughing a lot around me the whole weekend and shared a meal with me before she told me she actually had Mac.
I am now afraid I might have MAC. it was posted as a possible ideology for my pneumonia on my chest x-ray. Can this be transferred for sharing a meal? Or is it just droplets?