What diseases caused by rats could someone have died from during world war one?

Bubonic Plague or Black Death diseases





They were falsely thought to be caused by rats themselves but it was actually caused by the fleas they carries.





Black death:


http://img.photobucket.com/albums/v420/F鈥?/a>





Bubonic Plague:


http://en.wikipedia.org/wiki/Bubonic_pla鈥?/a>

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