In the Middle Ages, the corpses of sick animals were thrown into enemy cities with the help of catapults.

In the Middle Ages, the corpses of sick animals were thrown into enemy cities with the help of catapults. How did the throwers not get infected themselves?

The besiegers, bombarding the besieged in castles, fortresses, cities with corpses of animals to infect the latter with the plague, did not themselves become infected, for the reason that relatively fresh corpses of animals were thrown into the besieged territory until the decomposition process began in them, during which pathogenic bacteria were formed. The besieged were far from always able to utilize (and sometimes even find) the carcasses thrown through the walls and they had to face the consequences in the form of contaminated food and water, miasms of decomposition and diseases caused by bacteria.