Running into a burning building to save someone is the dumbest idea. You're not in a Hollywood movie. Smoke inhalation and burn damage is serious business. Let the trained professionals handle it, don't become another fucking casualty. I've been in a rather small fire, and it's not pretty.
The cold sore thing isn't a big deal. It's a different kind of herpes, it's not the same as genital herpes and it can be gotten rid of fairly easily. And I might add that mouth-to-mouth resuscitation, especially by an untrained person, has something less then 2% chance of actually doing anything. It's not the same thing you see on every fucking movie with romantic subplot involved. Either the person would be okay anyways, or you'll have to pretty much break their ribs pushing on their chest in order to make it work. It's that brutal.