I could be wrong -- I am no doctor nor medical practitioner of any kind. But it seems to me that typhoid "epidemics" are local. That is, an infected well or small stream, for instance, carries the typhoid germ and everyone who drinks from it may become ill. But they are usually localized and the sickness does not spread far beyond the use of that particular source of water. As for source of Spanish flu. How can anyone 80 years later pinpoint its source to one specific location, like Fort Riley? I don't understand. love joan