At least 20 people sick from (norovirus) outbreak

A probe into the source of what investigators believe was an outbreak of norovirus at the Hillcrest on Lake Wisconsin restaurant earlier this month is ongoing, but one official said it's possible the source of the virus may never be discovered.
http://www.wiscnews.com/saukprairieeagle/news/local/article_d7a57ef4-dc51-11df-854b-001cc4c002e0.html