Iodine is too reactive to be in nature as an element. Iodine compounds are not common in the ground. There is a mineral called caliche that is found in dry deserts. It has iodate in it. Iodide is found in seawater. Kelp has quite large amounts of iodine in it. Iodine is one of the heaviest elements needed by living things.
Azithromycin is effective for treating sinus infections caused by haemophilus influenzae, moraxella catarrhalis or streptococcus pneumoniae, according to the U.S. National Library of Medicine.
Azithromycin is used to treat a number of common bacterial infections in both children and adults. Ear, skin, and respiratory infections are among the infections that azithromycin treats. The medicine is also used to treat some sexually transmitted diseases, including gonorrhea and chlamydia. Off-label azithromycin uses include preventing heart infections and treating acne.