Genetic Analysis of Norovirus GII.4 Variant Strains Detected in Outbreaks of Gastroenteritis in Yokohama, Japan, from the 2006-2007 to the 2013-2014 Seasons
Fig 1
Monthly distribution of NoV GII.4 outbreaks by variant type in Yokohama, Japan.
Monthly distribution of NoV GII.4 variants identified in NoV outbreaks in Yokohama, Japan, from the 2006–2007 season to the 2013–2014 season. The x axis shows the time course by month; the y axis shows the number of GII and GII.4 variant outbreaks. Yerseke 2006a (orange), Den Haag 2006b (red), Apeldoorn 2007 (green), New Orleans 2009 (violet), and Sydney 2012 (blue). The dashed line indicates transitions in the number of GII outbreaks.
