Of all the IV users I know, not one of them has heated a shot, ever, and I've never heard of any of them having any problems from it. Here is Aus is H disolves easily without heat, as does the crystal, and they're really the only two things that people IV. If I was worried about bacteria I can get bacteria filters from the local exchange, but everything is swabbed/sterile before I use it, and if there was problems with bacteria/viruses in the gear then people would be dropping dead left, right, and centre.
