So, what you got in the truck? Nothing but a bunch of zombies who terrorizes your town and now that they have been captured, your mission is to transport them to the zombie vault. Don’t let any of them escape as they will just terrorize your town, but in case some of them did escape just proceed to your destination because you can’t do anything about it.
If you tried to pick the escape zombie alone then they might eat you and that will be your end. That is the reason why you need to go on with your delivery. Let others deal with the escape zombies and catch or kill it.