A medical treatment device consisting of a modified Hepatitis C virus, said Hepatitis C virus modified to have a quantity of surface probes to recognize, then engage one or more exterior cell-surface receptors on the surface of a Beta cell located in the Islets of Langerhans in the pancreas, said medical device expressing said quantity of surface probes intended to facilitate inserting said modified Hepatitis C virus's genome that it carries into said Beta cell, said Hepatitis C virus further modified to have its own innate positive sense ribonucleic acid genome replaced by a quantity of modified messenger ribonucleic acid molecules for the purpose of carrying out a medically therapeutic treatment.