The cells were used in the development of the polio vaccine, led to the first clone of a human cell, helped in the discovery that humans have 46 chromosomes, and were used to develop in vitro fertilization. By the time Gey published a short abstract claiming some credit for the development of the line, the cells were already being used by scientists all over the world.
Cells from these sources played a key part in the creation of the polio vaccine, enabled the first human cell clone, helped reveal that humans have 46 chromosomes, and contributed to the development of in vitro fertilization. At the same time, Gey's initial report claiming some credit for the line's origin took place before the cells were being used by scientists globally.