A report by Dr. Fred Jensen, in the Journal of the National Cancer Institute describes an experiment performed in patients terminally ill with cancer. The researchers took tissue from the patients, exposed the tissue to SV40, then they implanted the infected tissue back into the patients. Result: these implants grew into tumors in their human hosts, suggesting the possibility that SV40 could cause cancers in man. The experiment is cited in a 2003 Institute of Medicine report — without ever questioning the ethics of such an experiment: “The committee concludes that the biological evidence is strong that SV40 is a transforming virus.” Read more: SV40 Foundation