I always wash my fruit before I eat it when I buy it fresh. Recently I've been buying frozen bluberries and honestly I sort of like just eating them straight out of the bag (after letting them sit out for a little bit). But I'm wondering - should I be washing the berries before I eat them? If they were fresh I'd absolutely wash them but I'm unsure if this is necessary for frozen.
So far as I know it's never dangerous to refreeze so long as you're not doing something like sticking a big pot of hot whatever in the freezer (a slow freeze might mean the center is warm long enough for bacteria to proliferare).
But it can damage texture. Many frozen foods are catefully flash frozen to prevent crystals from breaking up cell walls and so on. Refreezing yourself can form said crystals. So if you freeze, say, cut-up bell-pepper slowly in your freezer it will go floppy when you thaw.
You can do something close to flash freezing at home using a baking sheet. For berries, spread them out one layer thick and put in the freezer for 2 hours. Then you can transfer them to a bag. They'll store even better if you suck air out if the bag before sealing.
Most likely you can just wash, then dry, then freeze on a tray, then put back in a bag with no tricks.
…all this to avoid the slight chance of norovirus. Life is pain.
Thanks for the step by step guide, btw. Appreciate it.