Conclusion

WHAT WAS THE CAUSE OF THE SPREAD OF THE MEDIEVAL BLACK DEATH? Choose one.

FLEAS ON RATS OR MIASMA (BAD AIR)

WHY? ANSWER IN 2-4 COMPLETE SENTENCES.

The cause of the spread of the medieval Black Death was fleas on rats. The fleas carried the bacteria Yersinia pestis, which was highly contagious and deadly to humans. As rats infested human settlements, the fleas found new hosts in humans and spread the disease rapidly throughout Europe.