6. joohn snows mode of cholera
- 1855
- 1837
- 1893
- 1893
7. when did the black death hit britain
- 1432
- 1348
- 1344
- 1234
8. when did flory and chain pufiry peniiln
- 1938-40
- 1927-40
- 1930-40
- 1939-40
9. when did jenner publish his vaccination findings
- 1782
- 1798
- 1762
- 1789
10. when did flemming discover penicilin
- 1947
- 1928
- 1938
- 1942
