Biowarfare has a long history: https://en.m.wikipedia.org/wiki/History_of_biological_warfare https://en.m.wikipedia.org/wiki/History_of_biological_warfar... So

Biowarfare has a long history: https://en.m.wikipedia.org/wiki/History_of_biological_warfare https://en.m.wikipedia.org/wiki/History_of_biological_warfar... Some believe that dead bodies infected with the black plague were catapulted over the walls in the siege of Kaffe.