1849: In 1848 the second cholera epidemic arrived in London and was thought to be because of “miasma” or “bad air”. John Snow had first hand experience of the disease from 1832 and could directly exclude the hypothesis of "bad air" and went on to hypothesize that cholera was attributable to a self-replicating agent which was excreted in the cholera evacuations and inadvertently ingested, often through water. He could later test his hypothesis in 1854 when another outbreak occurred. (1 ene 1848 año – 1 ene 1854 año)
Añadido al timeline:
fecha:
1 ene 1848 año
1 ene 1854 año
~ 6 years
