Doc trains the cooks to help out. Scary, huh?
I've seen a good chunk of an entire crew come down with tropical diseases after a port call in the Phillipines when they had a malaria outbreak and the water was contaminated by flooding.
The Doc earned his pay for the entire month. One guy spent two weeks in his bunk with an IV before we could transfer him to a hospital in Thailand.
Submarine Doc's earn their pay...and they are great people.