Low doses of IL-2 are administered to potentiate an immune response after antiviral treatment. The toner transport structure includes a path member that has an upper end and a lower end, an exit on a lower end side thereof, and an entrance on an upper end side thereof. The machines are connected via a secure network to a central processing unit. Correspondence among the two or more subnets may be provisioned by an authorized user of the system, may be learned automatically by the system based on ISUP message correspondences or previous TCAP transactions, or may be automatically discovered by the system broadcasting messages to nodes in the destined one of the two or more subnets.