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. 2021 Nov 4;7(11):e26523. doi: 10.2196/26523

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©Caoimhe Cawley, François Bergey, Alicia Mehl, Ashlee Finckh, Andreas Gilsdorf. Originally published in JMIR Public Health and Surveillance (https://publichealth.jmir.org), 04.11.2021.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in JMIR Public Health and Surveillance, is properly cited. The complete bibliographic information, a link to the original publication on https://publichealth.jmir.org, as well as this copyright and license information must be included.

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Population-adjusted age-stratified influenza-like illness rates as estimated by GrippeWeb (3 weekly moving averages, graphs show median values from 6 seasons 2011/12 to 2016/17). Data extracted from the study by Buchholz et al [4], as described in the Methods section. ILI: influenza-like illness.