History of the Peloponnesian War

Nor any difference of body, for strength or weakness, that was able to resist it; but it carried all away, what physic soever was administered.

But the greatest misery of all was the dejection of mind in such as found themselves beginning to be sick (for they grew presently desperate and gave themselves over without making any resistance), as also their dying thus like sheep, infected by mutual visitation, for the greatest mortality proceeded that way. For if men forebore to visit them for fear, then they died forlorn;