Thanks to a barfblog.com fan in Norway who provided the article and translation:

More than 100 participants at the health- and quality-registration conference were ill after eating from a lunch buffet at Radisson Blu Plaza Hotel Oslo on Thursday 10 March. The Norwegian institute of public health (FHI) was co-hosting the conference together with the Norwegian directorate of health.

One-hundred and thirteen people came down with symptoms like nausea, vomiting, abdominal pain and diarrhea. The Norwegian food safety authority has collected samples of food from the buffet and patient samples, while FHI sent out a survey to all the participants (399 of 600 have replied to the survey) but they still cannot confirm whether it was a virus or foodborne pathogen.

The Radisson Blu Plaza Hotel Oslo is a popular conference hotel and has Norways biggest banquet hall.

“There are a lot of sick people. this does happen that often” says department director and co-organizer Marta Ebbing from FHI. She was also affected along with several of her colleagues. “I was acutely ill for a day but haven’t recovered fully yet”.

In the first week of April FHI will be hosting a second conference at the same hotel, topic: Infection prevention and control (Smitteverndagene 2016).

There really hasn’t been an incident like this since 2008 when 70 people caught norovirus at a conference celebrating 60th anniversary of the Norwegian diabetes association.

“it was the second day of the conference and we were celebrating, but people just collapsed. In the end the band just packed their instruments and left” says Allgot. 35 people were hospitalised, but mostly as a precaution for the patients suffering from type 1 diabetes. The remainder of the conference was cancelled.