Article Title

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


We conducted a prospective household transmission study to examine whether receipt of 2009 trivalent influenza vaccine (TIV) was associated with increased risk of influenza-like illness (ILI) among contacts of confirmed pandemic influenza A(H1N1) 2009 patients. In the week following onset of pandemic illness in a household member, 46 (15%) of 304 TIV-vaccinated contacts, and 174 (15%) of 1,162 unvaccinated contacts developed ILI (p= 0.95). Receipt of 2009 TIV had no effect on one’s risk of pandemic illness.



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