Table 5

Crude and adjusted vaccine effectiveness of seasonal vaccine against influenza by year, age group and type/subtype, 2007-2008

Influenza vaccine effectiveness (95% CI)


All

A/H1

A/H3

B


2007

Crude

57 (27, 75)

46 (-28, 77)

64 (29, 81)

76 (-7, 94)

Adjusteda

0-19

-98 (-1906, 80)

-333 (-5401, 66)

-7 (-1850, 94)

Not defined

20-64

64 (29, 82)

48 (-65, 84)

69 (29, 87)

85 (-19, 98)

≥ 65

74 (-283, 98)

Not defined

84 (-156, 99)

Not defined

All ages

59 (25, 78)

27 (-92, 72)

68 (32, 85)

84 (-2, 98)

2008

Crude

26 (-40, 61)

-49 (-1367, 85)

-59 (-254, 28)

68 (7, 89)

Adjusteda

0-19

-441 (-7774, 63)

Not defined

Not defined

-314 (-6713, 75)

20-64

35 (-56, 73)

-88 (-1936, 83)

-17 (-255, 62)

71 (-32, 93)

≥ 65

Not defined

Not defined

Not defined

Not defined

All ages

9 (-96, 58)

-88 (-1936, 83)

-66 (-349, 39)

49 (-58, 84)


a adjusted for month of swab collection

Fielding et al. BMC Infectious Diseases 2011 11:170   doi:10.1186/1471-2334-11-170

Open Data