Canada's drug regulator asked Pfizer to provide data on the size of DNA fragments in its COVID-19 vaccine, due to genomic integration concerns, shortly after learning the pharma giant withheld information on DNA sequences contained in its product.
"Concerning the residual plasmid DNA in the drug substance, provide data/information characterizing the size distribution of the residual DNA fragments [and] residual intact circular plasmid," says a request for clarification Health Canada issued to Pfizer on Aug. 4, 2023.
Health Canada has not studied those risks, but told The Epoch Times last summer "The presence of residual plasmid DNA in the mRNA COVID-19 vaccines does not change the safety assessment of these vaccines." Seeking Clarifications Despite providing this answer to media in the summer of 2023, Health Canada scientists were privately discussing working with international partners to have Pfizer remove DNA fragments and SV40 sequences from its vaccines and they prepared several requests for clarification to the company.
Regarding the residual plasmid DNA in the COVID-19 vaccines, Health Canada asked Pfizer to provide data on the size distribution of the DNA fragments and on residual intact circular plasmid.
Health Canada and other regulators like the FDA and EMA were not aware of its presence, since Pfizer "Chose not to" disclose it, according to a separate email from Health Canada scientist Dr. Smith.
Pfizer said in a response to the Aug. 4 Health Canada request for information that the "SV40 promotor/enhancer DNA does not contain known oncogenes, infectious agents, or regions that could lead to functional transcripts, the DNA does not present any specific safety concerns."
Health Canada also said in a document tabled in Parliament in March that "Any claims the presence of the SV40 promoter enhancer sequence is linked to an increased risk of cancer are unfounded." Health Canada itself has not studied the risks.
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