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Yersinia pestis causes various plagues.
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Recent studies link genomic data to historical outbreaks.
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A mass grave in Jerash revealed a nearly identical Y. pestis strain.
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The study showed virulence factors aiding transmission.
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Plague strains emerged from multiple reservoirs, not a single source.
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Genetic changes were noted during pandemic periods.
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Modern strains are found in non-human reservoirs.
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Laboratory techniques enhance pathogen surveillance and understanding.
