A novel method for gene therapy using intranasal administration of genetically modified viral vectors. Target genes for therapeutic administration to a human patient, for many purposes such as production of telomerase in a patient's body, are selected and transfected into a bacterial cell. Viral transduction is used to infect a human-administrable virus with the target genes in the bacterial cell. A solution containing a therapeutic amount of transfected viral agents is intranasally administered the solution into a human patient.
