Monkey Virus Link to Cancer Grows Strongerhttp://articles.mercola.com/sites/articles/archive/2002/06/01/monkey-virus-part-three.aspxSV40 Timeline 1955 Jonas Salk introduces polio vaccine. Vaccine is injectible, and contains dead poliovirus. 1960 Monkey kidney extracts used to make vaccine are shown to cause four rare types of tumors in hamsters. SV40 is discovered in monkey kidneyenCommunityServer 2008.5 SP1 (Build: 31106.3070)