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CHOLERA - Coggle Diagram

- - - - this increased cholera as much of the city's water supply was coming from there
  - - - his book theorised that it was not bad air causing cholera, it was tainted water supplies
    - - On his map, he plotted each death from cholera with a dot. he was able to see where the disease was concentrated, and this led him to the water pump in broad street
        
        to prove his theory, he removed the handle of the pump, making it unusable, and the water non-accessible. he saw that the number of deaths declined rapidly
        
        it was later discovered that the water supply for the broad street pump was being contaminated by a leaking cesspit. Snow was proved right, but the board of general health did not act on his findings.
  - - - in 1866, cholera hits again and it is seen that the east, where the sewers are not connected to, suffers the most because they have to drink contaminated water.
        
        this was further proof of john snow's theories and the general board of health ccept the ideas, and connect all areas to the sewage system. there are no more outbreaks of cholera in london again.
- - - - the river was extremely contaminated - very toxic