![Portrait print of Robert Koch (1843-1910) microbiologist, Germany, 1895-1910 | Science Museum Group Collection Portrait print of Robert Koch (1843-1910) microbiologist, Germany, 1895-1910 | Science Museum Group Collection](https://coimages.sciencemuseumgroup.org.uk/images/434/medium_1982_1459_0036.jpg)
Portrait print of Robert Koch (1843-1910) microbiologist, Germany, 1895-1910 | Science Museum Group Collection
![An injection, which was used to drug species of monkeys, Stock Photo, Picture And Rights Managed Image. Pic. PAH-171129-99-68919-DPAI | agefotostock An injection, which was used to drug species of monkeys, Stock Photo, Picture And Rights Managed Image. Pic. PAH-171129-99-68919-DPAI | agefotostock](https://previews.agefotostock.com/previewimage/medibigoff/eab42cf14729dc3830200fe8d3a7bbb9/pah-171129-99-68919-dpai.jpg)
An injection, which was used to drug species of monkeys, Stock Photo, Picture And Rights Managed Image. Pic. PAH-171129-99-68919-DPAI | agefotostock
![Deutsches Museum on Twitter: "135 years ago Robert Koch presented his discovery of the tuberculosis bacteria to the public. Kochs original incubator is in our collection.… https://t.co/u3zef7UQuN" Deutsches Museum on Twitter: "135 years ago Robert Koch presented his discovery of the tuberculosis bacteria to the public. Kochs original incubator is in our collection.… https://t.co/u3zef7UQuN"](https://pbs.twimg.com/media/C7r9PwMXUAAyGPW.jpg)