Cancer is a class of diseases or disorders characterized by uncontrolled division of cells and the ability of these cells to invade other tissues, either by direct growth into adjacent tissue through invasion or by implantation into distant sites by metastasis.

The unregulated growth that characterizes cancer is caused by damage to DNA, resulting in mutations to genes that encode for proteins controlling cell division. These mutations can be caused by chemicals or physical agents called carcinogens, by close exposure to radioactive materials, or by certain viruses.

In more general terms, chemicals called mutagens, free radicals and chronic inflammation are known to cause mutations. Many vaccines have been shown to cause chronic inflammation, such as encephalitis (inflammation of the brain) and arthritic (inflammation of the joints), and inflammatory bowel diseases.

Of the known vaccine components, at least 7 have been found to be, or suspected to be, carcinogenic; Formaldehyde, Mercury, Phenols, ß-Propiolactone, Aluminum, Polysorbate 80, and SV40.