After the SUV explosion, one of the doors is lying on the ground next to it. Two wires that appear to have been attached to prevent the door from flying too far in the explosion can be seen attached to the bottom of the door to the vehicle.
If the plates under Angelo's bed canceled out the morphic field causing the immortality of the human race, then shouldn't those plates cause Jack to become immortal again, allowing his injuries to heal as they usually do?