Partial protection against 2009 pandemic influenza A (H1N1) of seasonal influenza vaccination and related regional factors: Updated systematic review and meta-analyses

Figures & data

Figure 1. Trial identification flowchart for English and Chinese databases: Adapted from PRISMA 2009 flow chart.²²

Figure 2. Seasonal influenza vaccine against pandemic A (H1N1) influenza infection: Forest plot for laboratory-confirmed cases, RCTs.

Figure 3. Seasonal influenza vaccine against pandemic A (H1N1) influenza infection: Forest plot for laboratory-confirmed cases, case-control study.

Figure 4. Seasonal influenza vaccine against laboratory-confirmed pandemic A (H1N1) influenza infection: Forest plot for subgroup analysis, case-control study.

Carcione D, Giele C, Goggin LS, Kwan KS, Smith DW, Dowse GK, Mak DB, Effler P. Association between 2009 seasonal influenza vaccine and influenza-like illness during the 2009 pandemic: preliminary results of a large household transmission study in Western Australia. Euro Surveill 2010; 15(28); PMID:20650055

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