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Figure 7 | BMC Public Health

Figure 7

From: Internet-based surveillance of Influenza-like-illness in the UK during the 2009 H1N1 influenza pandemic

Figure 7

Comparison of ILI incidence according to different definitions of ILI with the HPA's estimated ILI cases [17, 21, 27, 28]. As in Fig 3, the denominator used is those participants who completed the symptoms questionnaire on the week in question. All curves are plotted using a 3-week moving average; plots without this moving average can be found in the Supplementary material.

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