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6. Who solved this problem by developing a dosed inhaler?
- Robert Koch
- Dr John Snow
- Alexander Fleming
- Louis Pasteur
- Kaiser Wilhelm
7. Who developed blood groups in 1901?
- Ignaz Semmelweiss
- Richard Lewisohn
- Karl Landsteiner
- Carl Koller
- Harry Landster
8. Why was this development of blood groups so important?
- It made doctors happy so they helped more people
- It stopped people doing silly things to need surgery, because they did not want other peoples blood
- It made surgery possible as blood could be replaced without clotting due to incompatible bloodtypes
- It stopped blood curdling
- It saved time during surgery