Earlier quoted context omitted.
It's a plausible enough mistake to have happened before. Which to me, is good enough reason to not outright dismiss it as "obviously false". Some Polio vaccines were contaminated with SV40 for years, and it does, in fact, alter human DNA. For COVID-19, there have been at least 2 major cases of live virus vaccine contamination and recall. In the case of the Sputnik vaccine in Brazil and South Africa, there are claims…
The Polio/SV40 thing is itself an antivax talking point (and for the most part a load of nonsense). https://sciencebasedmedicine.org/another-antivaccine-zombie-...
>>polio vaccine administered from 1955–1963 was contaminated with simian virus 40 (SV40). The virus came from the monkey kidney cell cultures used to produce the vaccine. Most, but not all, of the contamination was in the inactivated polio vaccine (IPV). Once the contamination was recognized, steps were taken to eliminate it from future vaccines. There have been many questions as to the effects on people who received the contaminated vaccine. SV40 has biological properties consistent with a cancer-causing virus, but researchers have not conclusively established whether or not it could cause cancer in humans. Studies of groups of people who received polio vaccine during 1955–1963 provide evidence of no increased cancer risk.
>>However, because these epidemiologic studies are sufficiently flawed, the Institute of Medicine's Immunization Safety Review Committee concluded that the evidence was inadequate to conclude whether or not the contaminated polio vaccine caused cancer. In light of the biological evidence supporting the theory that SV40-contamination of polio vaccines could contribute to human cancers, the committee recommends continued public health attention in the form of policy analysis, communication, and targeted biological research.
https://www.ncbi.nlm.nih.gov/books/NBK221112/
That sounds like a load of nonsense?
>sciencebasedmedicine dot org
>> This one popped up at that online repository of all things quackery, NaturalNews.com
lol, pot, meet kettle.
Why can't you trust the science?
Simian virus 40 DNA sequences in human brain and bone tumours
https://pubmed.ncbi.nlm.nih.gov/9776221/
Sequence analyses of human tumor-associated SV40 DNAs and SV40 viral isolates from monkeys and humans
https://pubmed.ncbi.nlm.nih.gov/9584955/
Human cytomegalovirus major immediate early gene product can induce SV40 DNA replication in human embryonic lung cells
https://pubmed.ncbi.nlm.nih.gov/2173262/
Phylogenetic analysis of polyomavirus simian virus 40 from monkeys and humans reveals genetic variation
https://pubmed.ncbi.nlm.nih.gov/15308725/
SV40 DNA in human osteosarcomas shows sequence variation among T-antigen genes
https://pubmed.ncbi.nlm.nih.gov/9311596/
Natural simian virus 40 strains are present in human choroid plexus and ependymoma tumors