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Figure 1 | BMC Public Health

Figure 1

From: Using surveillance data to estimate pandemic vaccine effectiveness against laboratory confirmed influenza A(H1N1)2009 infection: two case-control studies, Spain, season 2009-2010

Figure 1

Surveillance-based study ILI cases (N = 1326) and ILI incidence at national level, season 2009-2010, Spain. Pandemic influenza laboratory positive cases (red), laboratory negative controls (grey grid) and Influenza-like illness incidence per 100,000 inhabitants at national level (blue line) by week of swabbing in the surveillance-based study.

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BMC Public Health

ISSN: 1471-2458

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