Actually, that calls to mind an interesting historical parallel. When the Mongols laid siege to the Genoese city of Caffa in 1346, they were heavily affected by an outbreak of the plague among their troops. Thoughtfully, they shared the wealth before abandoning the siege, by using catapults to toss hundreds of corpses of their plague victims over the city walls. Genoese sailors carrying that plague when returning to Italy is the most likely explanation of how the Black Death was introduced to Europe.
Just something else to mull over ;)