Just before the invention of HeLa cells, scientists have been unable to ascertain tissue cultures with any trustworthiness or stability. Over six a long time later, this cell line continues to be alive and currently being used for medical investigation. See Eye on Ethics: The Immortal Cell Line of Henrietta https://www.facebook.com/NewTechFind/posts/pfbid022JsHDTLNuxpfdSMfWcoohiK8mMZuFm1P7XpUjVw6pr6yGtPN2whP6BF4p7i2CgFHl