The short way of explaining this is that cold sores are not Herpes. Herpes is a virus, and cold sores are be one of the symptoms of that virus.
Think about it like getting chicken pox (also a zoster virus) when you were a kid: that is as contagious as it is because it's there before there are visible sores, and thus, people don't know it's there to be transmitted until it already has been. Some folks who get chicken pox get them everywhere imaginable, others only get a handful scattered lightly, and others still may have no symptoms or sores at all. The pox are a symptom of the virus, not the virus itself.
Editor and Founder, Scarleteen
My epitaph should read: "She worked herself into this ground."
-- Kay Bailey Hutchinson
[This message has been edited by Miz Scarlet (edited 07-17-2002).]