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Table 3 Overall and age-specific final attack rates for pH1N1 for different vaccination scenarios for R 0 1.4 and an 8-week vaccine campaign length.

From: Vaccination against 2009 pandemic H1N1 in a population dynamical model of Vancouver, Canada: timing is everything

Vaccination start date Vaccination strategy Attack rate,% (% reduction vs. None)
   All ages 0-4 5-17 18-54 ≥55
None None 48.3 35.1 78 47.5 24.1
24-Aug AC 8.0 (83) 4.6 (87) 12.0 (85) 8.9 (81) 3.2 (87)
  UC 10.1 (79) 6.7 (81) 20.0 (74) 8.8 (81) 4.0 (83)
  PC 6.1 (87) 7.8 (78) 1.1 (99) 8.5 (82) 5.0 (79)
  PC+ 4.3 (91) 5.0 (86) 0.9 (99) 6.2 (87) 3.2 (87)
28-Sep AC 25.5 (47) 16.0 (54) 42.3 (46) 25.7 (46) 10.9 (55)
  UC 26.8 (44) 18.3 (48) 49.2 (37) 24.7 (48) 11.7 (51)
  PC 14.1 (71) 14.0 (60) 9.4 (88) 18.3 (62) 9.5 (61)
  PC+ 12.1 (75) 12.3 (65) 7.7 (90) 15.9 (67) 8.2 (66)
26-Oct AC 42.0 (13) 28.9 (18) 69.8 (10) 41.1 (13) 19.7 (18)
  UC 42.0 (13) 29.8 (15) 71.5 (8) 40.3 (15) 19.9 (17)
  PC 37.7 (22) 29.3 (16) 54.1 (31) 39.3 (17) 20.1 (17)
  PC+ 36.4 (25) 28.5 (19) 52.0 (33) 38.0 (20) 19.5 (19)
23-Nov AC 47.4 (2) 34.1 (3) 77.1 (1) 46.5 (2) 23.4 (3)
  UC 47.4 (2) 34.2 (2) 77.2 (1) 46.4 (2) 23.4 (3)
  PC 47.0 (3) 34.4 (2) 75.2 (4) 46.5 (2) 23.6 (2)
  PC+ 46.8 (3) 34.3 (2) 74.9 (4) 46.3 (3) 23.5 (2)
  1. Attack rate is defined here as the total number of infections. 'AC' indicates the actual vaccination coverage for pH1N1 in the GVRD, 'UC' the uniform coverage vaccination strategy, 'PC' the parents and children vaccination strategy, and 'PC+' the PC/actual sequence strategy