Figure 2
From: Estimation of outbreak severity and transmissibility: Influenza A(H1N1)pdm09 in households
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.