History Memes

I mean... theorethically it could have helped spread it to the particular city, but I don't think that would've influenced the epidemic spread of the disease much. Locked-in besieged cities would -in themselves- been prime locations for the disease to teke hold.

In fact, your own article basicly states as much:

However, there’s no reason to tie the biological attack at Caffa with the introduction of the disease.