One now well documented example of this is the polio vaccine and many other vaccines which also contain the SV40 monkey virus. SV40 is now known to be a precursor for about 40% of the soft-tissue cancers according to some top pathologists.
Recently numerous physicians and medical researchers have discovered that a very powerful toxic cancer-causing substance (Nagalese) has been added to vaccines and foods to create a lot of different types of cancers.