How can I boost my immune system against norovirus?

How can I boost my immune system against norovirus? Ugh, that nasty stomach bug. Seriously, who needs that kind of misery in their life?

Okay, so boosting immunity against norovirus, huh? It's a tough one, because honestly, there's no magic bullet. But what I've been reading – and I've been doing a lot of reading since my sister came down with it last month, poor thing – suggests that Vitamin A might be a helpful thing. I mean, it's not a guarantee, but apparently, some studies show people with good Vitamin A levels seem to get hit less hard, or maybe not at all.

They say it's all about retinoic acid, which is a form of Vitamin A, and that stuff apparently helps your body's defenses – your first line of defense, even – fight off viruses more effectively. I don't know the exact science behind it all, but something about how it helps cells communicate better or something? I'm no scientist, just trying to figure out how to stay healthy! It certainly makes me want to load up on carrots and sweet potatoes, though. Remember that time I ate a whole bag of baby carrots in one sitting? Probably wasn't the healthiest choice, but maybe it gave my immune system a little boost. Who knows?

Anyway, it's not just Vitamin A, of course. Getting enough sleep, washing your hands religiously (like, seriously, I'm practically scrubbing my skin off), and trying to avoid touching your face – yeah, easier said than done, I know – all plays a part too. It’s all about supporting your immune system in general, not just focusing on one thing, right? I'm trying to be better about all of it, I really am. It's just so frustrating when you feel helpless against something like norovirus.