That's not a true statement. Fetal stem cells were used to develop the spike protein used in both the Pfizer and Moderna vaccines. And whether it's the pharmaceutical company or a "third party", fetal stem cells are still being used for quality control.
So it's false to say the vaccines aren't tainted by abortion.
This is not correct. The spike protein is produced by the mRNA strip connecting to a ribosome. They produced the mRNA strip based on the complete genome for SARS-CoV-2 being released by other researchers. Once they had the RNA sequence, it's just a matter of putting that RNA sequence together into an mRNA strip and packaging it in a lipid shell.
At no point during research, development, or production were fetal stem cells used for either Moderna or Pfizer. The independent third party chose to use fetal stem cells on their own. Neither Pfizer nor Moderna could have foreseen nor prevented the third party from using fetal stem cells because the FDA requires completely independent testing. If Moderna or Pfizer were able to dictate testing methodology for the verification stage, that testing would not be independent. That piece was outside of their control and it only happened after the product had been completely created and packaged and ready for distribution.