Antivaxers frequently object to the use of fetal cell lines to manufacture vaccines on "moral" grounds. Über-quack Joe Mercola lays down some astonishingly bad moral arguments based on pseudoscience.
On the eve of Easter and Passover, Ginger Taylor, MS (the MS is in Dunning-Kruger, apparently) tried to invoke several religions to argue for the right not to vaccinate on religious grounds. As usual, it did not go well.
Antiabortion antivaccine activists like to claim that "aborted fetal cells" in vaccines mean that vaccines are contaminated products of evil. In reality, there are no "aborted fetal cells" in vaccines. A cell line derived from an aborted fetus in 1962 did, however, lead to huge advances in vaccine technology and the prevention of many millions of deaths worldwide.