evidence: Experts say there’s no evidence to support Kirsch’s claim that the mRNA COVID-19 vaccines are contaminated or contain ingredients that weren’t disclosed to regulators. [...] Longley said Pfizer’s COVID-19 vaccine was reviewed by regulatory authorities, including the FDA and the European Medicines Agency, and met safety and quality control requirements. Those authorities also approved the development and manufacturing specifications for Pfizer’s COVID-19 vaccine, Longley said, including a method for assessing residual DNA that is outlined by the World Health Organization and the FDA. [...] Experts said there’s no evidence that the mRNA COVID-19 vaccines contain previously undisclosed contaminants. Pfizer said noninfectious SV40 sequences were part of the starting material for the Pfizer vaccine, and the FDA and other regulators approved the vaccine manufacturing process.