Here's why:
* Koch was a meticulous researcher: He understood the importance of proper laboratory techniques and safety precautions.
* He focused on the isolated bacteria: His research centered on studying the anthrax bacillus in a controlled environment, not on exposing himself to the disease.
* Early laboratory safety practices: While not as advanced as today, Koch likely took basic safety measures like using gloves and disinfectants.
While he was exposed to anthrax bacteria in his lab, he managed to avoid infection.
It's worth noting that many scientists in the early days of microbiology contracted the diseases they were studying due to a lack of understanding about pathogens and safety protocols. Koch's careful approach and understanding of the science made him a pioneer in the field of bacteriology.
