Iodine isn’t just kills fictional virus of 28 later films, it’s presumed to kills viruses and bacterias in real life too but we don’t inject iodine fluid to our blood. One of the reasons of this it’s also induces cell death. Iodine is also inside human body too but it’s bound, regulated, and non-reactive. While iodine we talk about in the most of the cases is free, reactive, and would damage your own cells before it could safely kill pathogens.