Table 1 Total number of patients by age and the distribution of influenza viruses in 66 patients

Age group in years

Number of patient (%) [%]¹

A

B

C

AB

Total negative (%)

Total positive (%) [%]²

<1

164 (100) [41.0]

19 (54.3)

8 (29.6)

1 (50.0)

0 (0)

136 (82.9)

28 (17.1) [42.4]

1-10

204 (100) [51.0]

13 (37.1)

17 (63.0)

1 (50.0)

2 (100)

171 (83.8)

33 (16.2) [50.0]

11-30

27 (100) [6.8]

3 (8.6)

2 (7.4)

0 (0)

0 (0)

22 (81.5)

5 (18.5) [7.6]

31-50

5 (100) [1.2]

0 (0)

0 (0)

0 (0)

0 (0)

5 (100)

0 (0)

Total

400 (100) [100]

35 (8.8) {53.0}³

27 (6.8) {40.9}

2 (0.5) {3.0}

2 (0.5) {3.0}

334 (83.5)

66 (16.5) [100] {100}