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Paul-Louis Simond

French physician

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Paul-Louis Simond was a French physician who made significant contributions to understanding the transmission of plague. In 1898, while working in India, Simond conducted experiments that demonstrated the role of Oriental rat fleas (Xenopsylla cheopis) in carrying the plague bacillus between rats. This research was crucial in establishing the link between rodents, fleas, and human infection, leading to improved public health measures aimed at rat control and sanitation. His work was a key development in understanding plague during the third great pandemic.1

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