"The connection between the chilling origins of many cell lines and the benefits they provide is perhaps most striking in the development of the rubella vaccine. Though it’s produced in WI-38 cells to this day, its early development relied heavily on cells taken from several different aborted foetuses – many of which had been aborted for the very reason that their mother was infected with the virus. Rubella can cause a number of serious consequences during pregnancy, such as stillbirth and miscarriage. If a woman is infected early on, she has a 90% chance of passing the virus to her unborn child, where it can lead to “congenital rubella syndrome” and a constellation of health problems, from brain damage to hearing loss. “You have to think, well what about the ethical consequences of not using the cell line?” says Olshansky. “Just keep in mind that they are a critical link in the chain, in the development of viral vaccines.”"