Serological Response in RT-PCR Confirmed H1N1-2009 Influenza A by Hemagglutination Inhibition and Virus Neutralization Assays: An Observational Study

The project was funded as part of the grant NMRC/H1N1O/002/2009 awarded by the National Medical Research Council of Singapore (www.nmrc.gov. sg/corp/index.aspx). The Melbourne WHO Collaborating Centre for Reference and Research on Influenza is supported by the Australian Government Department of Health and Ageing. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.