personally, i would go with Colloidal Silver over Iodine for some applications. both work fantastic. however. fungus CAN work around iodine. CS is the best candida fighter on the planet. i look at it like this: in general, Iodine for bacteria and CS for viruses and mold. with fungus, it depends on what and where it is. candida, a systemic fungal infection and unknowns - CS. fungus on extremities and topical fungus - iodine.
the only problem with CS is that it only works if its wet. that means for internal matters, no problem. externally, it must be kept misted. i have found that thirty minutes of keeping misted is highly effective for hours of relief from burns, rashes, etc.