6 jul 1872 año - Robert Koch (Country Doctor)
Descripción:
 Developed Koch Postulate to prove that a microorganism can cause a disease. The postulate involved taking bacteria and injecting it into a healthy animal where growth would happen. This was the Golden Age of Microbiology 
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fecha:
6 jul 1872 año
Ahora mismo
 ~ 153 years ago 
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