Question

The bubonic plague used rats and their fleas as a ______ to transmit the disease

Answer 1

Answer:

Spreader or transmitter or something

Explanation:

Answer 2

Answer:

carrier

Explanation:

A carrier is defined as a person/animal that that transmits a disease to another organism, often not having any symptoms of the disease they are carrying. In the case of the bubonic plague, rats and fleas carried the disease, which then was transmitted to people all over Europe.