Two years ago, I spent nine months with sinus infections. I had one after another, and if I didn't go to the doctor and get antibiotics, I got so sick that I would throw up. None of the doctors I saw could figure out why all of a sudden I was so prone to sinus infections. I saw an ear, nose and throat doctor and an infectious diseases doctor, as well as seeing almost every doctor and nurse practitioner at my GP's practice. I had every test you can imagine. And no one could figure out what the...