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Table 2 Samples positive for influenza in different age groups

From: Circulation of influenza A and B in the Czech Republic from 2000-2001 to 2015-2016

Seasona

Category

Influenza A, n (%)

Influenza B, n (%)

Sentinel

Non-sentinel

Total

Sentinel

Non-sentinel

Total

2009–2010

Samples processed

210

1056b

1268

1

0

1

Age group, y

 0–5 y

27 (12.9)

41 (3.9)

68 (5.4)

1 (100.0)

0 (0.0)

1 (100.0)

 6–14 y

74 (35.2)

91 (8.6)

165 (13.0)

0 (0.0)

0 (0.0)

0 (0.0)

 15–24 y

60 (28.6)

240 (22.7)

300 (23.7)

0 (0.0)

0 (0.0)

0 (0.0)

 25–59 y

43 (20.5)

572 (54.1)

615 (48.5)

0 (0.0)

0 (0.0)

0 (0.0)

  ≥ 60 y

6 (2.9)

112 (10.6)

118 (9.3)

0 (0.0)

0 (0.0)

0 (0.0)

2010–2011

Samples processed

140

205

345

71

28

99

Age group, n (%)

 0–5 y

14 (10.0)

7 (3.4)

21 (6.1)

2 (2.8)

1 (3.6)

3 (3.0)

 6–14 y

44 (31.4)

3 (1.5)

47 (13.6)

37 (52.1)

4 (14.3)

41 (41.4)

 15–24 y

24 (17.1)

12 (5.9)

36 (10.4)

19 (26.8)

3 (10.7)

22 (22.2)

 25–59 y

50 (35.7)

115 (56.1)

165 (47.8)

10 (14.1)

10 (35.7)

20 (20.2)

  ≥ 60 y

8 (5.7)

68 (33.2)

76 (22.0)

3 (4.2)

10 (35.7)

13 (13.1)

2011–2012

Samples processed

117

84

201

34

18

52

Age group, n (%)

 0–5 y

22 (18.8)

3 (3.6)

25 (12.4)

2 (5.9)

1 (5.6)

3 (5.8)

 6–14 y

35 (29.9)

3 (3.6)

38 (18.9)

17 (50.0)

2 (11.1)

19 (36.5)

 15–24 y

15 (12.8)

3 (3.6)

18 (9.0)

5 (14.7)

5 (27.8)

10 (19.2)

 25–59 y

37 (31.6)

35 (41.7)

72 (35.8)

8 (23.5)

7 (38.9)

15 (28.8)

  ≥ 60 y

8 (6.8)

40 (47.6)

48 (23.9)

2 (5.9)

3 (16.7)

5 (9.6)

2012–2013

Samples processed

162c

737

899

77c

201

278

Age group, n (%)

 0–5 y

14 (8.6)

20 (2.7)

34 (3.8)

6 (7.8)

6 (3.0)

12 (4.3)

 6–14 y

35 (21.6)

8 (1.1)

43 (4.8)

36 (46.8)

10 (5.0)

46 (16.5)

 15–24 y

19 (11.7)

16 (2.2)

35 (3.9)

11 (14.3)

9 (4.5)

20 (7.2)

 25–59 y

73 (45.1)

371 (50.3)

444 (49.4)

18 (23.4)

93 (46.3)

111 (39.9)

  ≥ 60 y

21 (13.0)

322 (43.7)

343 (38.2)

6 (7.8)

83 (41.3)

89 (32.0)

2013–2014

Samples processed

19

11

30

3

0

3

Age group, n (%)

 0–5 y

2 (10.5)

1 (9.1)

3 (10.0)

0 (0.0)

0 (0.0)

0 (0.0)

 6–14 y

4 (21.1)

0 (0.0)

4 (13.3)

2 (66.7)

0 (0.0)

2 (66.7)

 15–24 y

1 (5.3)

2 (18.2)

3 (10.0)

0 (0.0)

0 (0.0)

0 (0.0)

 25–59 y

11 (57.9)

5 (45.5)

16 (53.3)

1 (33.3)

0 (0.0)

1 (33.3)

  ≥ 60 y

1 (5.3)

3 (27.3)

4 (13.3)

0 (0.0)

0 (0.0)

0 (0.0)

2014–2015

Samples processed

126

213

339

89c

95

184

Age group, n (%)

 0–5 y

21 (16.7)

0 (0.0)

21 (6.2)

4 (4.5)

0 (0.0)

4 (2.2)

 6–14 y

23 (18.3)

0 (0.0)

23 (6.8)

2 (2.2)

0 (0.0)

2 (1.1)

 15–24 y

26 (20.6)

6 (2.8)

32 (9.4)

2 (2.2)

1 (1.1)

3 (1.6)

 25–59 y

33 (26.2)

26 (12.2)

59 (17.4)

80 (89.9)

14 (14.7)

94 (51.1)

  ≥ 60 y

23 (18.2)

181 (85.0)

204 (60.2)

1 (1.1)

80 (84.2)

81 (44.0)

2015–2016

Samples processed

70

188

258

69

79

148

Age group, n (%)

 0–5 y

12 (17.1)

2 (1.1)

14 (5.4)

8 (11.6)

0 (0.0)

8 (5.4)

 6–14 y

19 (27.1)

2 (1.1)

21 (8.1)

35 (50.7)

0 (0.0)

35 (23.6)

 15–24 y

5 (7.1)

4 (2.1)

9 (3.5)

17 (24.6)

5 (6.3)

22 (14.9)

 25–59 y

28 (40.0)

101 (53.7)

129 (50.0)

9 (13.0)

42 (53.2)

51 (34.5)

  ≥ 60 y

6 (8.6)

79 (42.0)

85 (32.9)

0 (0.0)

32 (40.5)

32 (21.6)

  1. aData per age group were not available for the seasons before 2009–2010 due to differences in data reporting systems
  2. bExcludes 8 samples that had no age information
  3. cExcludes 1 sample that had no age information