Just before the invention of HeLa cells, scientists were being unable to ascertain tissue cultures with any dependability or stability. Over 6 a long time later on, this cell line continues to be alive and getting used for clinical research. See Eye on Ethics: The Immortal Cell Line of Henrietta https://www.facebook.com/NewTechFind/posts/pfbid02RiZtF2CYQRNXKgPH6trquBJHCScc84k1QCRwYeyZWmLUNxJHv6cRNfFN7v8cEgq9l