When I got my chickenpox vaccination (obviously never had it),
I was told that the chance of contracting the Varicella virus, and related shingles and herpes virus are very slim.
Although clinically not proven, the chickenpox vaccination that children
receive nowadays (it's mandatory in California), should prevent the
spread of the VZV (varicella zoster virus) which causes chickenpox,
shingles, and herpes.
Quote:The varicella-zoster virus belongs to a group of herpes viruses that includes seven human viruses (it also includes animal viruses as well). Herpes viruses are similar in shape and size and reproduce within the structure of a cell. The particular cell depends upon the specific virus. The human herpes viruses are:
Herpes Simplex virus (the most common).
Varicella-zoster virus (VZV).
Cytomegalovirus (CMV).
Epstein-Barre virus (causes mononucleosis).
Human herpesvirus type 6 (causes roseola).
Human herpesvirus type 7 (HHV-7).
All herpes viruses share some common properties, including a pattern of active symptoms followed by latent inactive periods that can last for months, years, or even for a lifetime.
source:
http://adam.about.com/reports/000082.htm