Like adrenochrome, they can only get these stem cells FROM LIVING BABIES, who then die because of the procedure. It kills them.
They extract the stem cells while the baby is alive; and it takes 293 attempts to get what they need to stick it in a shot that kills you or worse.
In short, they have to murder a living baby through surgery without anesthesia to get HEK293.
How much more evil can these Edomites get? I mean really?