[firebrand]

Once people are infected, they infect other people very rapidly. So all the stuff about barriers to rats would only apply to the earliest stage of the plague. When it hit heavily populated areas, it became a person-to-person disease.

[mewzilla]

I didn't know that the bubonic plague could be spread person to person? I thought fleas were the vector? And that a flea had to bite an infected person, then bite another victim in order to spread the disease?