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Table 1 Baseline number of GBS cases among vaccinated individuals, November 2, 2009 - February 7, 2010

From: Estimating background rates of Guillain-Barré Syndrome in Ontario in order to respond to safety concerns during pandemic H1N1/09 immunization campaign

Week of Vaccination Campaign Projected number of individuals vaccinated in Ontario Projected cumulative baseline number of GBS cases
  32% coverage 38% coverage 32% coverage 38% coverage
Week 1: Oct 26 - Nov 1 240,322 285,382 N/A N/A
Week 2: Nov 2 - Nov 8 418,444 496,902 0.04 - 0.11 0.05 - 0.13
Week 3: Nov 9 - 15 519,186 616,533 0.17 - 0.40 0.20 - 0.48
Week 4: Nov 16 - 22 970,861 1,152,898 0.39 - 0.93 0.46 - 1.1
Week 5: Nov 23 - 29 1,057,184 1,255,406 0.79 - 1.9 0.94 - 2.2
Week 6: Nov 30 - Dec 6 634,192 753,103 1.4 - 3.3 1.6 - 3.9
Week 7: Dec 7 - 13 239,874 284,850 2.1 - 5.0 2.5 - 6.0
Week 8: Dec 14 - 20 72,191 85,726 2.8 - 6.7 3.3 - 8.0
Week 9: Dec 21 - 27 29,887 35,491 3.5 - 8.3 4.1 - 9.9
Week 10: Dec 28 - Jan 3 0 0 4.0 - 9.6 4.8 - 11.4
Week 11: Jan 4 - 10 0 0 4.4 - 10.5 5.2 - 12.5
Week 12: Jan 11 - 17 0 0 4.6 - 11.0 5.5 - 13.0
Week 13: Jan 18 - 24 0 0 4.7 - 11.1 5.5 - 13.2
Week 14: Jan 25 - 31 0 0 4.7 - 11.2 5.6 - 13.3
Week 15: Feb 1 - 7 0 0 4.7 - 11.2 5.6 - 13.3