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. Author manuscript; available in PMC: 2016 Mar 1.
Published in final edited form as: Epidemiol Infect. 2015 Mar;143(4):766–771. doi: 10.1017/S0950268814001472

Figure 1.

Figure 1

Influenza activity and influenza-associated regression coefficients in Hong Kong, 2001–2011. A) Weekly influenza activity for seasonal influenza A(H1N1) (yellow areas), A(H3N2) (dark blue areas) and B (green areas) and A(H1N1)pdm09 (red areas) and 14 influenza seasons (light blue areas). B) Weekly regression coefficients (solid line) for influenza A(H1N1) with 95% confidence intervals (dashed lines). Purple area indicates the effect of increase in laboratory capacity during A(H1N1)pdm09. C) Weekly regression coefficients (solid line) for influenza A(H3N2) with 95% confidence intervals (dashed lines). D) Weekly regression coefficients (solid line) for influenza B with 95% confidence intervals (dashed lines) (see supplementary material for further details about the notation).

Abbreviations: sH1N1= seasonal influenza A(H1N1); sH3N2=seasonal influenza A(H3N2); pH1N1=influenza A(H1N1)pdm09