A Life Recycling Variant is a term which encompasses individuals or their descendants who have had their DNA, neural structure, or other biological components heavily modified, due to the Life Recycling Act. Some may display extraordinary physical abilities or superhuman powers depending on the level of modification, but on the other hand many suffer from adverse mental effects.
The U.R.T.V.s are Life Recycling Variants.
In the case of Andrew Cherenkov, he was part of a Super Soldier program developed by a "certain branch of the military." He was created via artificial insemination, and equipped with several modifications before being sent off to battle.