I came down with it last Wednesday night. Violent vomiting, diarrhea then a mild fever throughout Thurs. By Friday I was almost 100% good to go. Mostly weak due to lack of eating.......I had the flu shot so I think that helped lessen the symptoms........
The Flu vaccine would have nothing to do with it as it isn’t the Flu
A flu shot has no effect on a norovirus. Completely different type of virus and not covered in the influenza shots. There is to my knowledge no vaccine for the norovirus but it typically only last 24-48 hours.