Actually, I have been on cruise ships. And if you would bother to read more than headlines you would understand that this particular cruise ship is quarantined. They are testing the passengers for the WHV. Started with one old Chinese passenger, then it was 20 positives, now 41 more - and that is after they quarantined it and started taking steps to contain the virus. Beyond that, I won't stoop to calling you a bonehead for your ignorance or lack of grammar or punctuation.
Patient zero apparently boarded Dec 30 in Hong Kong
Ship has tested about 273 passengers, with 61 positives so far
That is pretty strikingly high infection rate
The rest of the 3000+ passengers have about another week in quarantine, which is self isolation locked in cabins