Returning to Virgil's "731" comment earlier, I now find that the other "non-Roman" book I am reading presently
"Toxin"
http://www.amazon.co.uk/exec/obidos/ASIN/0...2620765-5794332
is a sobering read about public health, washing your hands, making sure sewage is disposed of and the 731 atrocities as part of the evolution of understanding bacterial poisons. There is a great deal here about population morbidity and "plagues" , historically and presently.I feel a blog may be forthcoming.Toxic warfare is of course not new , I was unaware that Hannibal had pots of poisinous snakes hurled onto the King of Pergammon's ships, but lobbing corpses of men and animals into your opponents water supply seems to be a universal and ancient art.