Sorry to respond to your question with a question for myself... I'm new here and seeking answers. If you wouldn't mind me asking, how was the diagnosis made for your lung infection? What time do f testing was done? I'm guessing through a sample of lung mucus, but I might be wrong. I have chronic chest congestion and tightness, but right now, doctors are only focussing on the sinus diagnosis. Thank you to anyone who has knowledge to share about this!