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. 2017 Jan 31;145(6):1193–1202. doi: 10.1017/S0950268816003290

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© Cambridge University Press 2017

This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 2. — Continuous black line represents the age-standardized estimated (a) AGI, (b) ARI and (c) ILI incidence based on weekly questionnaires sent to Hälsorapport, a cohort of 3245 Swedish people, between November 2013 and November 2014. The dashed line represents the weekly proportion of samples positive for norovirus over the total sample tested for norovirus (voluntary and aggregated laboratory data submitted to the Public Health Agency of Sweden). (b) The weekly proportion of searches on cough over total searches launched to the Swedish medical website 1177.se. (c) The estimated weekly incidence of patients with ILI consulting sentinel GPs based on an algorithm applied to different search terms to the Swedish medical website 1177.se.