<style face="normal" font="default" size="100%">Plague and leprosy in the Middle Ages: a paradoxical cross-immunity?</style>

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0<style face="normal" font="default" size="100%">Plague and leprosy in the Middle Ages: a paradoxical cross-immunity?</style><style face="normal" font="default" size="100%">Plague and leprosy in the Middle Ages: a paradoxical cross-immunity?</style>