Polio vaccines - By 1968, all sorts of viruses were found in vaccines.

Adenovirus, Papovaviruses (there are 120 types of human papillomavirus).

HPV causes essentially all cervical cancer and anogenital warts. HPV is a DNA tumor virus similar to SV40 and polyomavirus), Herpes viruses, Poxviruses, Picornaviruses, Enteroviruses, Myxoviruses and Reoviruses had been discovered.

Additional overlooked viral contaminants included Epstein Barr commonly called mononucleosis and Simian Cytomegalovirus.

Infection with cytomegalovirus (CMV) is the leading cause of congenital deafness, blindness, mental retardation, and seizures secondary to maternal infection and accounts for disease in 40,000 infants per year in the United States.

Simian foamy retroviruses (SV40) were also found and that included the unique AIDS-linked enzyme "reverse transcriptase." The virus numbers were up to SV59.