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A fluorescent image of a human body louse with <em>Yersinia pestis</em> infection — that's the cause of the plague — depicted in orange/red in the glands.<br>
National Institute of Allergy and Infectious Diseases
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National Institute of Allergy and Infectious Diseases
The mystery: How did bubonic plague spread so rapidly? Could rat fleas have done it all? A new study points the finger at lice as possible accomplices.
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