Table 2.

Incidence rates (cases per 1000 persons) for influenza-like illnesses (ILI; InfluNet surveillance system of the Italian National Health Institute), and corresponding excess incidence rates calculated for 2020–2021 and 2021–2022 compared to the averages for 2017–2020. Comparisons between seasonal incidence rates were performed by means of analysis of the variance (ANOVA) with post-hoc test of Dunnet, assuming reporting season 2017–2018 as the reference one.

	Seasonal Incidence Rate (Cases per 1000 Persons; 95%CI)					Excess Incidence Rates (%, 95%CI)
	2017–2018	2018–2019	2019–2020	2020–2021	2021–2022	2017–2020 vs. 2020–2021	2017–2020 vs. 2021–2022
0–4 years	13.46 (8.65; 18.26) [REFERENCE]	13.06 (8.52; 17.60) [p = 1.000]	11.37 (6.94; 15.80) [p = 0.839]	2.67 (2.35; 2.98) [p < 0.001]	11.58 (10.32; 12.84) [p = 0.882]	−78.89% (−91.06.; −66.72)	−8.31% (−88.71; +72.10)
5–14 years	7.41 (4.64; 10.18) [REFERENCE]	6.91 (4.32; 9.49) [p = 0.994]	7.11 (3.90; 10.31) [p = 0.999]	1.26 (1.12; 1.40) [p = 0.001]	4.81 (4.32; 5.30) [p = 0.307]	−82.38% (−99.40; −65.36)	−32.66% (−99.68; +34.36)
TOTAL	5.11 (3.29; 6.94) [REFERENCE]	4.79 (3.19; 6.38) [p = 0.988]	4.49 (3.04; 5.95) [p = 0.888]	1.44 (1.32; 1.56) [p < 0.001]	3.94 (3.61; 4.27) [p = 0.475]	−69.94% (−89.26; −50.62)	−17.85% (−64.10; +28.39)