Henrietta Lacks (August 1, 1920 – October 4, 1951) (sometimes erroneously called Henrietta Lakes, Helen Lane or Helen Larson) was an African-American woman who was the unwitting source of cells (from her cancerous tumor) which were cultured by George Otto Gey to create the first known human immortal cell line for medical research. This is now known as the HeLa cell line.