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Table 2 Additional 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

 

Projected cumulative additional number of GBS cases

Week of Vaccination Campaign

1992/94 Seasonal Flu

(Lasky et al [10])

1976 Swine Flu

(Schonberger et al [4])

 

32% coverage

38% coverage

32% coverage

38% coverage

Week 1: Oct 26 - Nov 1

N/A

N/A

N/A

N/A

Week 2: Nov 2 - Nov 8

0.01

0.02

0.19

0.23

Week 3: Nov 9 - 15

0.16

0.19

1.2

1.4

Week 4: Nov 16 - 22

0.45

0.54

3.4

4.0

Week 5: Nov 23 - 29

0.89

1.1

7.1

8.4

Week 6: Nov 30 - Dec 6

1.6

1.9

12.6

15.0

Week 7: Dec 7 - 13

2.5

3.0

19.7

23.4

Week 8: Dec 14 - 20

3.3

3.9

26.2

31.1

Week 9: Dec 21 - 27

3.8

4.5

30.6

36.4

Week 10: Dec 28 - Jan 3

4.2

4.9

33.1

39.3

Week 11: Jan 4 - 10

4.4

5.2

34.3

40.8

Week 12: Jan 11 - 17

4.5

5.4

34.8

41.3

Week 13: Jan 18 - 24

4.6

5.4

34.9

41.5

Week 14: Jan 25 - 31

4.6

5.5

35.0

41.5

Week 15: Feb 1 - 7

4.6

5.5

35.0

41.5