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Monthly Archives: June 2013

21 Jun

The procedure for blood typing was developed by Karl Landsteiner around 1900.  He determined that human blood groups can be separated into four groups on the basis of two antigens that are present on the surface of red blood cells.  … Continue reading

07 Jun

A differential white blood cell count or differential WBC count can be used to determine which infectious disease is present in an individual.  In 1883 Elie Metchnikoff puplished the phagocytic theory of immunity.  He postulated that large cells in the … Continue reading