London. A second cholera epidemic erupts in the city, 22 years after the first. It kills over 500 people in the SoHo neighborhood in just two weeks. Then, doctor John Snow maps all known cholera cases and discovers they are clustered around the Broad Street public water pump. He persuades the authorities to shut it down, and the epidemic comes to a halt. New underground sewer systems and a better understanding of the bacterial nature of diseases like cholera ensure that this will be London’s last cholera epidemic.
