31 juill. 1873 - Hansens disease germ first discovered
Description:
Dr. Gerhard Henrik Armauer Hansen of Norway was the first person to identify the germ that causes leprosy under a microscope. Hansen's discovery of Mycobacterium leprae proved that leprosy was caused by a germ, and was thus not hereditary, from a curse, or from a sin.Ajouté au bande de temps:
Date:
31 juill. 1873
Maintenaint
~ Il y a 152 ans