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Table 1 Mean seasonal incidence of ILI per 1000 patients, seasons 2008/09 – 2018/19, Italy

From: Excess hospitalizations and in-hospital mortality associated with seasonal influenza in Italy: a 11-year retrospective study

Seasona

Total

0–4 years

5–14 years

15–64 years

 ≥ 65 years

2008/09

2.5

6.6

4.8

2.0

1.2

2009/10

3.3

8.1

9.2

2.3

0.9

2010/11

3.5

9.1

7.00

2.9

1.0

2011/12

3.0

7.9

4.5

2.6

1.3

2012/13

3.6

9.1

6.7

3.2

1.3

2013/14

2.7

7.4

4.2

2.5

1.1

2014/15

3.7

8.9

6.0

3.5

1.6

2015/16

2.9

7.9

5.7

2.4

1.0

2016/17

3.2

8.0

4.6

3.0

1.8

2017/18

5.1

13.5

7.4

4.7

2.6

2018/19

4.8

13.1

6.9

4.5

2.2

11-season mean

3.5

9.0

6.1

3.0

1.5

3-season meanb

4.4

11.5

6.3

4.07

2.2

  1. ILI Influenza-like illness
  2. aWeek 42 to week 17 of the following year are covered
  3. bIncludes the most recent seasons, namely 2016/17, 2017/18, and 2018/19
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BMC Infectious Diseases

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