I was on the ship on Dec 17-23 and everything went pretty good I'd say. They didn't make the virus outbreak a big deal. There was a flyer which had information about the virus(how to prevent it, how you get it.. etc). They had hand sanitizers everywhere so it seemed like they were taking proper precautions.
However.. my friend did get sick on the first night from some stomach virus? She was put into quarantine for 24 hours and thankfully got better from then on. The infirmary staff seemed to be really onto it, informing room service that she'd be ordering quite often, informing the restaurant of her absence.. etc.
Other then that, everything seemed to have gone smoothly!