Jan 2, 2010
1850s: Cholera rages through London and Paris, taking many lives and putting many people on guard against illness.
1890s: Because of better public hygiene, industrial towns have started to reduce the transmission of cholera and other contagious diseases. On a similar note, vaccines and x-rays come into use.
Today: As modern medicine creates antibiotics and other medicines to combat disease, bacteria evolve, prompting the creation of newer medications.
1850s: With rare exception, middle-class...
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