D'oh! This thread popped up a couple days too late...I was down at a filk con in Atlanta last weekend and there was a guy there who sings the song I think Dean's looking for. Tho' I think I have an e-mail lurking around, so I can still see if I can scrounge it up.

I remember the chorus as:

"It was the great pandemic and it swept the whole world wide
Caught soldiers and civilians and they died, died, died
Whether standing in the trenches or lying in their beds
20 million of them got it and they're dead, dead, dead"

-- Gary