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Table 4 Cases and controls by year, age group, vaccination status and type/subtype, 2007-2008

From: Estimation of type- and subtype-specific influenza vaccine effectiveness in Victoria, Australia using a test negative case control method, 2007-2008

  Total study participants Total vaccinated (%) Controls vaccinated (%) Influenza cases vaccinated (%)
     All A/H1 A/H3 B
2007        
   0-4 14 0 0 0 0 0 0
   5-19 64 4 (6) 1 (5) 3 (7) 2 (17) 1 (4) 0
   20-49 239 35 (15) 27 (21) 8 (7) 2 (8) 6 (9) 0
   50-64 50 20 (40) 13 (46) 7 (32) 2 (50) 2 (14) 1 (50)
   ≥ 65 19 15 (79) 8 (89) 7 (70) 1 (100) 4 (57) 1 (100)
   Total 386 74 (19) 49 (26) 25 (13) 7 (16) 13 (11) 2 (8)
2008        
   0-4 9 1 (11) 0 1 (20) 0 1 (100) 0
   5-19 65 4 (6) 2 (5) 2 (7) 0 0 2 (9)
   20-49 197 23 (12) 17 (12) 6 (11) 1 (33) 4 (22) 1 (3)
   50-64 41 14 (34) 12 (40) 2 (18) 0 1 (11) 1 (100)
   ≥ 65 17 14 (82) 10 (77) 4 (100) 0 4 (100) 0
   Total 330a 56 (17) 41 (18) 15 (14) 1 (25) 10 (26) 4 (7)
  1. a Age unknown for one case