Mary Mallon: The Silent Killer of New York City

This is the story of the silent killer of New York City in the early 1900s. Mary Mallon was the first known healthy carrier of salmonella typhi in the United States, and was responsible for a few thousand cases of Typhoid Fever in the city over the course of a few years.
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Sources:
George, S. A. (n.d.). George Soper on Mary Mallon. Robert Bender. sites.lsa.umic...
Marineli, F., Tsoucalas, G., Karamanou, M., & Androutsos, G. (2013). Mary Mallon (1869-1938) and the history of typhoid fever. Annals of gastroenterology. www.ncbi.nlm.n...
Pratishkhedekar / CC BY-SA 4.0 via Wikimedia Commons (Clams)
Photographic Collection from Australia / CC BY 2.0 via Wikimedia Commons (Poverty in Urban Area)
Reivax / CC BY-SA 2.0 via Wikimedia Commons (Riverside Hospital)
Otis Historical Archives Nat'l Museum of Health & Medicine / CC BY 2.0 via Wikimedia Commons (Typhoid Poster)

[@mytho_raj]

Keep doing this man, the subscriber count is low but it will grow soon. Subscribed,from India

[@vattevineeth4567]

A question I have always had: How were they able to identify the bacteria or other creatures back in 1907? And perform blood/urine examinations?