In 1961, the virus was found to cause tumors in rodents (Eddy et al., 1961) The SV40 virus was also found in several types of tumors in humans, for instance mesotheliomas (rare tumors located in the lungs), brain, and bone tumors (Carbone et al., 1994; Jasani et al., 2001). More recently, SV40 has also been found to be associated with some types of non-Hodgkin's lymphoma (Shivapurkar et al., 2002; Vilchez et al., 2002).
SV40 was linked with mesothelioma after tumors developed in hamsters that were injected with SV40 into the lungs, heart and abdomen (Cicala et al., 1993). Mesotheliomas are rare cancers usually located in the lining of the lungs in humans and are believed to be associated with asbestos exposure. SV40 has been found in 47% to 83% of human mesothelioma tumors (Carbone, 1999). In addition, reports have documented an association between SV40 and brain and bone tumors (Jasani, 2001). Two recent studies also found an association between SV40 and non-Hodgkin's lymphoma (Shivapurkar et al., 2002; Vilchez et al., 2002). These studies identified the virus in 42 to 43 percent of non-Hodgkin's tumors, while finding no SV40 in tissue from healthy study volunteers.
The CDC and the industry claim that the SV40 virus was removed from all polio vaccines after 1963. However, recent published studies as well as legal documents from a court case filed against the manufacturer of the vaccine (Lederle) reveal that SV40 was not removed from the oral polio vaccines after 1963. Over 600 million doses of the oral polio vaccines were manufactured and sold by Lederle in the US and around the globe between 1963-2000.