Theorized Role in Human Disease
The hypothesis that SV40 might cause cancer in humans has been a particularly controversial area of research. Several different methods have been used to detect SV40 in a variety of human cancers, although how reliable these detection methods are, and whether SV40 has any role in causing these tumors, remains unclear. As a result of these uncertainties, academic opinion remains divided, with some arguing that this hypothesis is not supported by the data, and others arguing that some cancers may involve SV40. However, the United States National Cancer Institute announced in 2004 that although SV40 does cause cancer in some animal models, "substantial epidemiological evidence has accumulated to indicate that SV40 likely does not cause cancer in humans". This announcement is based on two recent studies.
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