Tak mi to nedalo a pohledala jsem na pubmedu

A case of adult-onset varicella pneumonia and varicella-zoster virus (VZV) meningitis resulting from a reoccurrence of varicella].
[Article in Japanese]
Yamashita H1, Ueda Y, Takahashi Y, Akio M.

Clin Microbiol Rev. Jul 1996; 9(3): 361–381. PMCID: PMC172899Varicella-zoster virus.
A M Arvin
....Susceptibility rates among individuals over 18 years old are
about 5% in temperate climates, but as many as 50% of young
adults in tropical regions have not had primary VZV infection
(196). Second episodes of varicella are rare (92).

Gershon, A. A., S. P. Steinberg, and L. Gelb. 1984. Clinical reinfection with
varicella-zoster virus. J. Infect. Dis. 149:137–142.