Hope-Simpson RE :The nature of herpes zoster :a long-term study and a new hypothesis. Proc R Soc Med, 58: 9-20, 1965.
Berger R, Florent G, Just M: Decrease of the lymphoproliferative response to varicella-zoster virus antigen in the aged. Infect Immun, 32 : 24-27, 1981.
Burke BL, Steele RW, Beard OW, et al: Immune responses to varicella-zoster in the aged. Arch Intern Med, 142 :291-293, 1982.
Thomas SL, Wheeler JG, Hall AJ :Contacts with varicella or with children and protection against herpes zoster in adults: a case-control study. Lancet, 360: 678-682, 2002.
Yih WK, Brooks DR, Lett SM, et al : The incidence of varicella and herpes zoster in Massachusetts as measured by the Behavioral Risk Factor Surveillance System (BRFSS) during a period of increasing varicella vaccine coverage, 1998-2003. BMC Public Health, 5 : 68, 2005.