Figure 2From: Determinants of individuals’ risks to 2009 pandemic influenza virus infection at household level amongst Djibouti city residents - A CoPanFlu cross-sectional study Reverse cumulative distribution curves of HI titres for antibodies and their 95% confidence intervals against H1N1pdm09 for different age groups amongst Djibouti city residents (Nov 2010-Feb 2011). Back to article page