Lucia
From what I got out of that is you have to live in that enviornment for years to have it only become an irritant. The subjects were more or less present while the chemical were being introduced and say peak periods where swimming activities can elevate levels.
Back a few years ago we had a respitory killer called Legionairs desease SP,

The search to find out what happened reveled that MANY buildings
had poorly or no maintained Air handling systems. When you take into account all the variables??
Im no expert but the pool I use I believe uses bromine and the air exchange seems quite adequate. Also ozoneators are comming on fast. who knows maybe they are already near you.
On another note my brother in law took a very serious shot of clorine in the plant he worked in. He Shut off a valve so others could escape the leak. ( A hero in my book) but today he has asthma and sometimes requires a inhaler but not very often. And the dose he took I was told you could smell for miles.
just my 2 cents
jim