My guess, is now every one on the ship gets a shot, and they hear a call from the captain's dad on the ham radio, than what; who knows, my other guess is the captain tries to find them, and save them, and the guy who was a working on the vaccine owes him one, and goes with him I really like it, main reason is
Ebola's real, and it could change, if it did become airborne, this TV show would be the real deal. And he gets there just in the nick of time maybe or his wife dies, or his dad dies
http://time.com/3144658/berlin-ebola/