Norway’s Food Safety Authority (Mattilsynet) says norovirus – originating in staff or cold food served at a hotel buffet or both — swept through the Clarion Hotel Gardermoen, near Oslo’s main airport, Saturday afternoon and evening.

The victims included members of a national diabetes foundation attending a conference and what was supposed to be the foundation’s 60th anniversary party.

Instead, most of them wound up vomiting and suffering from acute diarrhea, especially serious ailments for diabetics. More than 30 were taken to hospital, and scores of other visitors at the hotel also fell ill, including hotel staff and members of a band hired in to play at the foundation’s party.

Here’s another norovirus infosheet from the past with some tips. The originals can be found at foodsafetyinfosheets.ksu.edu