The ship will make it fun for them. The food and drink will be plentiful and all for free. Id love this myself.
If 300 is the passenger and crew capacity, it’s not that much of a cruise ship. The smaller they are, the earlier claustrophobia sets in.
This was a crew member who has measles. they live in close quarters and fraternize with each other, a lot. That raises a lot of red flags about how well crew members are checked.
The cruise I took in November had a one-day stop (ie: six hours or so) in St. Lucia. The port city, except the cruiser's shopping area, was disgusting. Open sewers, poorly maintained, slummy living, unpleasant unregulated traffic, beggars. It would be awful if a measles epidemic spread in that population (which they try to keep cruisers from noticing).