Questions then – is it like the cold virus, where every season it keeps mutating? Otherwise why don’t we have a vaccine (if indeed it’s worth the effort of a vaccine for something that’s unpleasant but ultimately relatively harmless)? Alternatively if it is like the cold virus, will them three above now have immunity, or can we all pass it round and round again?
Not entirely sure a vaccine would work, it’s viral, not bacterial, they’re have to find an anti-viral that would work, and Norovirus isn’t really as big a threat as flu, which can kill lots of people; Norovirus just makes you beg for a quick, clean end.
It is, apparently, very difficult to study, because of the speed it works at, and it only needs tiny amounts to infect.
Had it once, it was deeply unpleasant, left me wrung out for months, after I caught some sort of flu-like virus straight after, which turned my head and lungs into industrial-scale green goo factories.
And, as anyone who’s had a cold will attest, having caught one, you’re not immune to catching more.