If someone hasn’t said it yet, this movie in the link below Snow portrays the father of epidemiology (how we map diseases), John Snow (no not GoT lol).
Essentially we use a link diagram….ask sick person where they routinely go, who they saw before they were sick, go to those places/people, and repeat.
-Only a BS in Public Health so not exactly an expert but we did do these as assignments during my time in school.
https://m.imdb.com/title/tt2061801/
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