10 MODERN BIOLOGIC THERAPEUSIS 



firmly grounded in physiology and pathology. 

 As a biologist, Hunter dissected and described 

 over 500 different species of animals. 



Vaccination Toward the end of the century 



William Harvey (1578-1657). 



came one of the greatest triumphs in the history 

 of medicine the successful introduction of pre- 

 ventive inoculation by Edward Jenner (1749- 

 1823). It had long been a countryside tradition 

 in Gloucestershire that dairymaids who had 



