Too smarted by half ping.
1) Prehistoric times were 1500 years ago.
2) Irrigation methods were used 1500 years ago. Who knew??
3) People in Egypt built things and altered their environment. Whoa! Stop the presses!
“Schistosomiasis is readily treated using a single oral dose of the drug praziquantel annually.[11] As with other major parasitic diseases, there is ongoing and extensive research into developing a schistosomiasis vaccine that will prevent the parasite from completing its life cycle in humans.”
http://en.wikipedia.org/wiki/Schistosomiasis
Is this another slam on agriculturists by the wild river crowd who oppose irrigation?
I’m remembering a MASH episode where they were trying to pull the wool over Hot Lips by justifying a quarantine of a tent because the inhabitant supposedly had schistosomiasis. I think it was Potter who figured the ruse out.