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The original post: /r/askscience by /u/kheret on 2024-12-26 18:01:18.

I’ve heard a lot of things about Norovirus. Only bleach kills it. It only takes a few particles to become infected. It lives on surfaces for two weeks. Immunity only lasts two months. You shed virus for weeks after infection.

If all of this is true, how come it isn’t a LOT more widespread? I’ve read it infects about 5-10% of the population annually. I got norovirus or something like it twice last spring from my son who got it at school. Before that, I think I MIGHT have had it once in my life when I was a kid. But if all of the above is true, you’d expect to get it a lot more often.