Below is an recent Mayo Clinic study/article on sinus infections, fungus and immune response. If you're familiar with candidiasis, you will know that antibiotics will only perpetuate fungal growth by killing off beneficial organisms and weakening the immune system that keep fungus in check. It is very difficult to kill fungus once it is established and feeding off body tissues. And all sugars, and other carbs, including fruits, are great party foods for fungi. (Just ask the well-established colony I have in my small intestine, as well as systemically! And, relating partially to the article below, I have an eosinophil party going on at the same time, with lots of monocytes cleaning up after the party-goers.) This is not to say that ALL sinus infections are fungal, nor that other factors can play a roll but, dang!, fungus in 96% of the patients is no small number. Lois