No Evidence of Polio Vaccine Resulting in 'Cancer Virus' for Millions

Misbar investigated the circulating claim and found it to be selective. The presence of SV40 in vaccines does not automatically imply a causal relationship with cancer in humans.

Origins of The Claim

The origins of this false claim can be traced back to a 2015 article published by Vaccine.news, a website associated with the Natural News Network. Known for its dissemination of anti-vaccine content and health misinformation, the Natural News Network has stirred controversy multiple times. 

The selective headline, "CDC admits 98 million Americans were given cancer virus via the polio shot," misrepresents a document previously released by the CDC. This document discussed a real incident that occurred between 1955 and 1963 when some polio vaccines were contaminated with SV40, derived from monkey kidney cells used in the manufacturing process at that time.

The Facts: Contamination and Studies

The CDC's fact sheet, published in 2007, revealed that during the specified period, over 98 million individuals in the United States received polio vaccinations, with 10-30% of those shots found to be contaminated with SV40. It is important to emphasize that the presence of SV40 in these vaccines does not automatically imply a causal relationship with cancer in humans.

While certain types of cancer have been found to contain SV40 in humans, extensive studies have failed to establish a direct link between SV40 and cancer. Furthermore, a newly published webpage on the CDC's website addressing the incident reaffirms the absence of a causal association between SV40-contaminated polio vaccines and the development of cancer.

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