Ugh. How large a group, and was it shared cooking or “catered” meals?

I remember reading posts on Cycle Oregon’s forum the year a noro virus spread through camp. (Fortunately, I didn’t do it that year.). Many (hundreds, IIRC) of the 2,000 or so people got it. People were getting out of their tents and puking before they could get to port-potties. After the event, some of the ill volunteered to get tested. The state’s Department of Health confirmed that they had the same strain of noro virus.