From: Incidence and effects of Varicella Zoster Virus infection on academic activities of medical undergraduates - a five-year follow-up study from Sri Lanka
Mean age (SD) years
26.7
(0.95)
Sex
   Male (%)
29
(67.4)
   Female (%)
14
(32.6)
Ethnicity
   Sinhalese (%)
42
(97.7)
   Tamil (%)
01
(2.3)