If I may add to this, not having seen the original message, speaking as one having suffered numerous lung problems and infections in the course of my life, one thing I found that helped immensely is lemon essential oil. Nothing has done more for cutting lung infections short for me than this.
This isn't meant to be any contradiction to what Luella said. Had I known about CS years ago I probably would've used that as well. Lemon oil is relatively cheap and should be in the arsenal of anyone experiencing chronic or severe lung infections.