The father of Endocrinology is "Thomas Addison'. The first endocrine disease reported was Addison's disease (1855), caused by the destruction of adrenal cortex. R H Whittaker (1969), an American Ecologist proposed a five kingdom classificaion of the living world comprising Monera, Protista, Plantae, Fungi and Animalia. Louis Pasteur (1880) a French scientist, developed the first true vaccine (consisting of weakened micro-organisms) against chicken cholera.