Table 2 Estimated under-reporting factors for norovirus illness by age-group and sex during a large outbreak of Shiga toxin-producing E. coli O104, Germany, 2011

0-9

1.16

0.94

1.43

1.18

0.95

1.45

1.22

0.86

1.72

1.34

0.94

1.89

1.10

0.86

1.40

1.07

0.83

1.37

10-19

2.08

1.66

2.62

1.96

1.56

2.46

2.49

1.73

3.58

2.18

1.51

3.13

1.83

1.39

2.40

1.80

1.37

2.35

20-29

2.63

2.11

3.27

2.28

1.83

2.82

2.88

2.01

4.11

2.67

1.87

3.79

2.43

1.87

3.15

2.03

1.57

2.62

30-39

2.25

1.80

2.81

2.09

1.68

2.61

2.52

1.75

3.61

2.55

1.78

3.64

2.05

1.57

2.68

1.82

1.40

2.37

40-49

1.88

1.50

2.34

1.79

1.44

2.23

2.42

1.69

3.46

2.02

1.41

2.88

1.57

1.20

2.05

1.63

1.26

2.11

50-59

1.74

1.40

2.17

1.75

1.41

2.18

2.00

1.40

2.86

2.03

1.43

2.90

1.57

1.20

2.04

1.57

1.21

2.04

60-69

1.30

1.04

1.63

1.47

1.18

1.84

1.61

1.12

2.30

1.72

1.20

2.46

1.12

0.85

1.46

1.31

1.00

1.70

70+

1.12

0.91

1.39

0.96

0.78

1.18

1.44

1.02

2.03

1.19

0.84

1.67

0.95

0.74

1.22

0.83

0.65

1.06