This article is from the WSSF 2016 AFRMA Rat & Mouse Tales news-magazine.
An archaeologist found after spending nearly 10 years researching for his book The Black Death of London, concludes that rats are not the cause of the 1348–1349 Black Death of London, but rather humans from close contact to each other in the crowded city. Fleas don’t survive the winter months when the disease gripped the city and not enough black rat skeletons have been found to make them the plague carriers.
Story in The Guardian
Black Death study lets rats off the hook.