1927 - César Milstein was born.

Milstein was an Argentine biochemist who shares the 1984 Nobel Prize in Medicine with Niels K. Jerne and Georges Köhler for their work on the immune system and the discovery of monoclonal antibodies. Together with Köhler, he developed the hybridoma technique to produce monoclonal antibodies. They fused antibody producing B-lymphocyte cells with tumor cells to produce a hybridoma that continuously produced antibodies. This technique is used in the commercial development of diagnostic tests and new drugs.