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.
It is an unusual antibiotic in that it stays in the body for quite a while (has a long half-life), allowing for once-a-day dosing and for shorter treatment courses for most infections. The FDA approved azithromycin in November 1991. PRESCRIBED FOR: Azithromycin is effective against susceptible bacteria causing: 1  otitis media (infection of the middle ear), 2  tonsillitis, 3  laryngitis, 4  bronchitis, 5  pneumonia, 6  sinusitis, 7  uncomplicated skin and skin structure infections,