title: Analysis of the protovirus hypothesis.
abstract: Cancer may be endogenous to all mankind. Its activity is dependent upon the absence of anti cancer gene agent or agents.
mesh_terms: D002471:Cell Transformation, Neoplastic; D006801:Humans; D008954:Models, Biological; D009369:Neoplasms / Q000235:genetics* / Q000635:transmission; D009857:Oncogenes; D009858:Oncogenic Viruses