Fig. 1From: Influence of herd immunity on norovirus: a long-term field study of repeated viral gastroenteritis outbreaks at the same facilitiesDistribution of norovirus genotypes in a K/Ns, b PSs, and c NHs by season. Distributions from 2007–2008 to 2014–2015 season were confirmed in our previous study (ref. 3). GII.other includes undetermined genotypes for GII. K/Ns: Kindergarten/nursery schools; PSs: Primary schools; NHs: Nursing homes for the agedBack to article page