In 1953, HeLa cells were the first human cells successfully cloned[11] and demand for the HeLa cells quickly grew in the nascent biomedical industry. Since the cells' first mass replications, they have been used by scientists in various types of investigations including disease research, gene mapping, effects of toxic substances on organisms, and radiation on humans.[2] Additionally, HeLa cells have been used to test human sensitivity to tape, glue, cosmetics, and many other products.[3]