The outbreak of cholera was a scary time in the mid 1800's. People were dying within hours of contracting the disease, and no one could figure out how or why. John Snow, however, made a hypothesis about how this deadly disease was spreading.Watch the HarvardX John Snow and the 1854 Broad Street Cholera Outbreak video which discusses how observations of a public well led to the discovery of how cholera was spreading and killing so many people. Thanks to John Snow and the scientific method, healthcare providers were better able to treat and save patients. Explain why the scientific process is important when learning about diseases.