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. 2012 Aug 31;13:49. doi: 10.1186/1471-2172-13-49

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Copyright ©2012 Kelly et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Anti-H1N1 antibody levels detected by microbead-based array assay before and within 1–5 months after receiving the ASO3-adjuvanted A/California/07/09 H1N1 influenza HA vaccine for 80 HIV-infected individuals (a). The dotted line at MFI 125 separates individuals with pre-existing anti-H1N1 antibodies from those without. Comparison of the age distribution for vaccinated individuals categorized as non-responders, responders or responders with pre-existing antibodies against A/California/07/09 H1N1 HA (b). Lines within groups show the group median with IQR and the p value indicating probability of no significant difference between groups is shown above lines spanning the groups being compared.