@blm1007blm1007 I would assume if there is in fact any connection between the pool and the hemoptysis it would be some sort of irritation from the chlorine with regard to the bronchiectasis (“BE”) (or maybe those backflips). The pool I was in was outdoor at a large resort, very busy, I assume it was heavily chlorinated. I did not have any history of lung infection/disease when I went to the ER, I would have told you then that my lungs were fine - it was quite a shock. I was eventually diagnosed with MAI, after sputum, but I doubt the MAI came from the pool or that an initial exposure of MAI would cause hemoptysis overnight. I have advanced disease so I must have had the MAI for some time and didn’t know it. As for whether swimming pools are safe for those of us at heightened risk for lung infections, the information I have seen/heard seems all over the place. I think it’s safe to say indoor pools are a hard no, but outdoor pools … well, we each have to decide what our comfort level is with what seems largely unknown/unstudied. For now, myself, I am staying out of pools, but it makes me sad. And if I were in my 80’s I don’t know that I would give up something so joyful when the risk seems so uncertain.