I already gave my opinion to that question on this Carnival site further down on a post entitled "If catch a virus you can be confined". You might want to read it. My main point was that if you don't feel great, you don't know what's wrong and neither does the cruiseline, and that being the case, they will always prefer to err on the side of caution meaning you get screwed and they don't have to deal with a potential problem. If you don't feel 100%, keep it to yourself, unless you feel bad enough to require medical attention. I have to go, so just read my other post.