The S to 40 in 72 Base Pair Enhancer

22 to 20% of the population is believed to be infected with s to 40 from either the polio vaccine or just from natural background, which means they may have T antigen already natively present. If that were to get integrated into the genome, it could drive DNA replication RNA replication wherever it lands and the concern is it can land in front of a proto oncogene or something that drives cancer. But not the fragment size I don't think is a good argument against this we've already demonstrated there are some large for large enough fragments in there That you could be integrating DNA sequences that are quite active in the million cell lines.