Departmental Event - Food Poisoning!

My department had quite an incident recently. It all happened when we tried out a new food catering service for one of our conferences. It was kinda nice buffet-style dinner, with usual cuisines like chicken/ beef/ vege and ya, the mutton (which we all then think the most suspicious culprit!). The night after dinner was relatively uneventful - as compared to what happened the next day.So this is