@CNN: The spread of the plague during the Black Death that killed millions was fueled by humans, not rodents, as previously believed, a new study has found https://t.co/Nu4b1y33Wo https://t.co/lzIuTqEUNU

@CNN: The spread of the plague during the Black Death that killed millions was fueled by humans, not rodents, as previously believed, a new study has found https://t.co/Nu4b1y33Wo https://t.co/lzIuTqEUNU