Monoclonal antibodies are artificially produced identical antibodies that are derived from a single parent cell. Some key historical milestones included the 1973 concept of hybridoma technology by Jerrold Schwaber, the 1975 development of hybridomas by Kohler and Milstein to produce large amounts of monoclonal antibodies, and their receipt of the 1984 Nobel Prize in Medicine. Monoclonal antibodies provide passive immunity for immune deficient patients and were first approved for use in humans in 1986.