A highly contagious stomach bug that will lay you out for 2 days, also charmingly known as the "winter vomiting bug."
First Scott had it, then Emma, Tam (and her parents) and Jonah. Now Andrea. The norovirus is "in" in 2008.
Editorial note: Whoa! You've found a super-old post here on BuzzFeed, from an earlier era of the site. It doesn't really represent where we are anymore, and may in fact be totally broken, but we're leaving it up as a part of our early history.