Though not particularly inspiring or clever (whenever a character on a TV show has a lesson or experience early on, you can bet the writers will make it somehow miraculously relevant by the episode's end unless they actually try to subvert expectations) episode, it was a solid "monster of the week" (the monster being the freighter and the danger it represents, not the literal monster here) episode. So instead of spending too much time discussing it, I'd rather discuss something that has been an ongoing issue in Star Trek since the beginning but seems to be especially prominent in Voyager...the bizarre reticence of the ST powers that be to feature suits of any sort -- EVA suits, biohazard suits, radiation suits, space suits in general, etc. Occasionally we'll get a suit when the alternative is simply impossible, like Paris and Torres being stuck out free-floating in the vacuum of space, but it's rare. It almost feels like a mythos vanity, as if the Star Trek bible doesn't like to show characters who aren't immediately identifiable as being from Star Trek via either uniform or general appearance. In this case, aboard a freighter contaminated with radiation and in need of decompression, the fact that there are no radiation suits or EVA suits with magnetic grips (it would seem that 24th century technology could devise a single suit for multiple types of dangers) just seems almost egregiously silly. Granted, a lot of the drama would have to be rewritten, but at least it would make sense contextually.
This is not a problem solely found in this episode or this series, but it is one that is accentuated by this particular episode more so than usual. It just nags while watching. Incidentally, it would have also been nice to offer even a technobabble explanation for why the time frame for inoculation was an issue in the first place, seeing as they could (and did) clearly inject more later, so what did it matter unless there was a severely limited supply for some reason?