Question

How do we know that all people, rich and poor, were susceptible to The Black Death?

Answer 1

http://www.historyextra.com/feature/black-death i hope this help its alot of reading tho!

Answer 2

The thing is during the Middle Ages life expectancy was low as well as medicine. Kinda like now how the Spanish Flu killed many people in the 40's(?) but know its nothing more than a regular cold.