Just to make it easy ... here's the abstract:
To date, the scientific literature and research examining SV40 and cancer-related diseases has been based upon an assumption that SV40 was not present in any poliovirus vaccine administered in the United States and was removed from the killed polio vaccine by 1963. The basis for this presumption has been that the regulations for live oral polio vaccine required that SV40 be removed from the seeds and monovalent pools ultimately produced in the manufacturing process. The Division of Biologic Standards permitted an additional two tissue culture passages--from three to five--in order to allow manufacturers the ability to remove this contaminant from the oral poliovirus vaccines then awaiting licensure. The confirmation of the removal by one drug manufacturer, Lederle, has been made public at an international symposium in January 1997, where its representatives stated that all of Lederle's seeds had been tested and screened to assure that it was free from SV40 virus. However, in litigation involving the Lederle oral polio vaccine, the manufacturer's internal documents failed to reveal such removal in all of the seeds. The absence of confirmatory testing of the seeds, as well as testimony of a Lederle manager, indicate that this claim of removal of SV40 and the testing for SV40 in all the seeds cannot be fully substantiated. These legal documents and testimony indicate that the scientific community should not be content with prior assumptions that SV40 could not have been in the oral polio vaccine. Only further investigation by outside scientific and independent researchers who can review the test results claimed in the January 1997 meeting and who can conduct their own independent evaluations by testing all the seeds and individual mono-valent pools will assure that SV40 has not been present in commercially sold oral poliovirus vaccine manufactured by Lederle.
Here's my comment:
So even if they've cleaned up polio vaccine of SV40 (IF), there's still reason for concern about many other vaccines grown/manufactured on various other tissue cultures, either animal or human ... if polio vaccine doesn't contain SV40 (IF), other vaccines may well contain other animal viruses, or animal dna or human dna - with no way to know just exactly how our bodies will interact with these foreign proteins/viruses/dna;
Then of course, there's this (also posted by Lowell Hubbs):
If SV40 can be spread horizontally (from person to person in some fashion), then what else might be transferred? SV40 is a monkey virus, but flu vaccine is still (generally) produced using chicken eggs - are there avian viruses in flu vaccine? Is anyone checking for this? There is an ever expanding mosaic of novel substrates being used to make vaccines (like insect tissue), in part to make vaccines available to those who have allergies to eggs or other substrates (in other words, they react dangerously to the foreign protein that is not able to be removed from the vaccine during production and "purification") - but it begs the question, what other foreign proteins will be included, even inadvertently, in these vaccines as well? What dna? What bacteria and/or viruses?
This is precisely why my position is that vaccines should be an individual decision, never mandated ... if you are willing to accept this risk because you believe there is a benefit greater than the risk you should get a vaccine. But if you do not think the benefit is greater than the risk you should be free not to get a vaccine.