Figure 2.

Final size data. The final size data (that is, frequency distribution of total number of cases by household size) for different classifications of cases: Laboratory confirmation through PCR; being swabbed (most likely due to meeting HPA ILI diagnostic criteria); having any ARI symptoms; and inferred in the statistical model. Histograms are stratified by household size. ARI, acute respiratory infection; HPA, Health Protection Agency; ILI, Influenza-like illness.

House et al. BMC Medicine 2012 10:117   doi:10.1186/1741-7015-10-117
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