“The use of fetal tissue in research is not new. Fetal cells extracted from the lungs of two aborted fetuses from Europe in the 1960s are still being propagated in cell culture. They’re so successful that today we still use them to produce vaccines forhepatitis A, rubella, chickenpox and shingles. From two terminated pregnancies, countless lives have been spared.”
http://mobile.nytimes.com/2015/07/30/opinion/the-case-for-fetal-cell-research.html?_r=0