Two of your usual dinner companions aren’t in their seats, and when you look around at nearby tables you notice other empty seats too.
Then the rumors begin: Something’s going around. People are sick. There’s an epidemic.
It's enough to give a passenger a case of anxiety. But a case of anxiety is better than a case of what’s often called stomach flu.
Sickness can spread like wildfire at sea. We've all heard the grim reports of cruise ship voyages beset by hundreds of cases of gastrointestinal illness, so many that ship infirmaries can’t handle all of them.
Maybe you’ve even been aboard a stricken ship where crew members dump globs of sanitizer on the hands of...