It specifically causes non-viable mutations. Therefore, the concern isn't currently that it'll cause mutations in the virus and create new strains, but rather t

It specifically causes non-viable mutations. Therefore, the concern isn't currently that it'll cause mutations in the virus and create new strains, but rather that we have to be very confident that it isn't resulting in mutagenicity in mammalian cells. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8136050/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8136050/