I wouldn't be giving give the experiences of a coupe on a cruise ship much credibility.
A two week lockdown should be long enough to determine
a) if its doing anything at all
b) how much longer to lockdown
c) to assess lifting the lockout on some areas but not others
This is exactly what China and Korea have done. And it looks like it has worked.
Interesting to see a world wide shut down of all Apple stores and a reopening of all Chinese Apple Stores.