A preprint study done by microbiologist Kevin McKernan came out amid news on skyrocketing cancer cases worldwide. It concluded that copy DNA or complementary DNA (cDNA), is coming off of Escherichia coli (E. coli) as part of the manufacturing cDNA is found in high concentrations contaminating these vials.

"And Jeff, you can't believe it. But you know, one of the sequences is SV40 [simian vacuolating virus 40], which is a known tumor gene promoter," McCullough told "Prather Point" host Jeffrey Prather. "To make matters worse, you can't believe that spike protein is produced in abundance." He went on to say that the S1 and S2 segments look like they interfere with two tumor suppressor systems, the p53 tumor suppressor protein and BRCA, or the BReast CAncer gene.