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Britannica Sources used in this answer

Where did the Third Plague Pandemic begin in the 1850s?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
two plague victims with sores lying in bed, while a robed figure gestures above them.
plague Image depicting victims of the sixth biblical plague.

The Third Plague Pandemic is thought to have gained momentum in Yunnan province, located in southwestern China, during the 1850s.1