touch wood never had it but i know a few who have.
I have had food poisoning twice (Salmonella and Campylobacter) and was essentially fine with both (I got myself a nice routine of 40 mins watching TV then 20 mins on the loo with a book, no sickness with either, just bad stomach cramps which i can live with)
but Norovirus i really do not want.
We had genetic testing done for 20 traits at work for fun one of them highlighted that i have a natural strong immunity for Norovirus so hopefully i never get to experience it.