Distribution of reported hospitalized dengue disease cases according to age, Brazil, 2002–2010.

<p>A reduction in the first quartile of dengue disease hospitalizations is evident in 2007–2008, although data from 2009 suggest this change may have been transient. Data are median, first and third quartiles, and minimum and maximum ages; the dashed line indicates age 15 years. (Siqueira 2010 <a href="http://www.plosntds.org/article/info:doi/10.1371/journal.pntd.0002520#pntd.0002520-Siqueira1" target="_blank">[26]</a>. Figure updated and reproduced with kind permission from the Secretariat of Health Surveillance (SVS) of the Ministry of Health of Brazil; additional data supplied by Siqueira JB, 2012).