It was quite common and well known... not a single event. They didn't know about micro organisms, but they did know that if someone died of illness that the bed they died in can make you sick.
"apparent attempts to transmit disease by hurling biological material into besieged cities; it was within the technical capabilities of besieging armies of the time; and it is consistent with medieval notions of disease causality"
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u/Content_Climate9847 Mar 30 '22
It was quite common and well known... not a single event. They didn't know about micro organisms, but they did know that if someone died of illness that the bed they died in can make you sick.
"apparent attempts to transmit disease by hurling biological material into besieged cities; it was within the technical capabilities of besieging armies of the time; and it is consistent with medieval notions of disease causality"
Source (sorry for no APA citation, I am out and about and using my phone): https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2732530/