Let's get accurate. Some part of all Salk vaccines made between 1955 and 1963 were contaminated with a monkey virus, SV 40, and when that was realized it was stopped. Later this accidental cohort was analyzed and did have a significant rise in cancer rates. https://pubmed.ncbi.nlm.nih.gov/10472327/. NIH is a disgrace but probably the seminal source of later reports. However, it is not true that "98 million" had cancer, that's how many vaccines were distributed and not all were polluted.
Let's get accurate. Some part of all Salk vaccines made between 1955 and 1963 were contaminated with a monkey virus, SV 40, and when that was realized it was stopped. Later this accidental cohort was analyzed and did have a significant rise in cancer rates. https://pubmed.ncbi.nlm.nih.gov/10472327/. NIH is a disgrace but probably the seminal source of later reports. However, it is not true that "98 million" had cancer, that's how many vaccines were distributed and not all were polluted.