[zo1]

You can get re-infected. As far as I know, it doesn't stay dormant in your body (like say Herpes). But I'm not a doctor, just had it a few mild times as a kid.

[JupiterMoon]

> it doesn't stay dormant in your body

Yes it does.

> just had it a few mild times as a kid.

Nope you have it. When you are in poor general health it will probably resurface. Good luck.