33. The Pfizer, Moderna and J&J jabs were developed using fetal cell lines, that is, cells grown in labs originally obtained from aborted fetuses decades ago. The argument used by pro-vaxers is that these are not the original cells, but descendants or duplicates of the originals. The medical term varies depending on the aborted fetus' number and organ . You have a right to decline any vaccine that was developed with or contains fetal cell lines, based on your religious or philosophical beliefs.