Submitted by Linzold t3_11eft2j in explainlikeimfive
DarkAlman t1_jaeaxz0 wrote
Reply to comment by [deleted] in [eli5] Black plaque was not exactly cured, how did it just disappear from Europe in 1353? by Linzold
Trial and error
They discovered that people who kept clean didn't get as sick
The Pope famously hid in a circle of flame to keep him safe during the worst of the plague. The theory was to keep 'bad air' away, but in fact it was keeping him safe from the rats
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