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Table 1 Characteristics of 510 Students who attended grades 1, 3, and 4 in one elementary school during the varicella outbreak period, from April 2007 to May 2007.

From: An Outbreak of Varicella among Schoolchildren in Taipei

Characteristic Grade 1
(N = 155)
Grade 3
(N = 160)
Grade 4
(N = 195)
  Students with varicella Students without varicella Students with varicella Students without varicella Students with varicella Students without varicella
Sex       
Female 5 (3.2) 77 (49.7) 0 (0.0) 76 (47.5) 1 (0.5) 90 (46.2)
Male 8 (5.2) 65 (41.9) 2 (1.3) 82 (51.3) 0 (0.0) 104 (53.3)
Susceptibility       
History of varicella 0 (0.0) 17 (11.0) 0 (0.0) 28 (17.5) 0 (0.0) 73 (37.4)
Unvaccinated 4 (2.6) 11 (7.1) 1 (0.6) 30 (18.8) 1 (0.5) 66 (3.0)
Vaccinated 9 (5.8) 114 (73.5) 1 (0.6) 100 (62.5) 0 (0.0) 55 (28.2)
Vaccine coverage 134 (89.1) 115 (70.6) 72 (45.1)
  1. NOTE: Data are of no.(%) of students.
  2. Vaccine coverage = [The Number of vaccinated students]/[The Number of total students]