"The beauty of this system is that we do not needtomodifythe item being protected in any way with tags, chips or ink - it is as if documents and packaging had their own unique DNA, " said Professor Cowburn.
Furthermore, scientists think they understand the steps they needto take to genetically modify pig tissue so that it will not be rejected by the human immune system.
When it seems imminent that spending will go over the cap, officials say they will needtomodify benefits, payment rates, and look to managed care for services.