http://www.cbsnews.com/news/cdc-royal-caribbean-cruise-has-more-than-600-sick-passengers-crew/
There are many articles out there about the cruise ship likely infected with norovirus that has over 600 ill. While looking into it, I found this too; CDC roundup of all past cruise ship illness outbreaks:
http://www.cdc.gov/nceh/vsp/surv/gilist.htm
DH wanted to go on a cruise for his 30th birthday next year, but I'm not so sure