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. 2015 Feb 16;5:8462. doi: 10.1038/srep08462

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Here, the analysis is done using the absolute number of cases, from 2001 to 2012. Note that the time series are plotted in free scale. The data from Belo Horizonte is now, after the event, updated till October of 2014. The white bars confine the period where the football World Cup took place, from 12 of June to 13 of July 2014.